{"product_id":"mirka-fbs-b-12v-3-8-in-x-13-in-cordless-file-belt-sander-tool-only-mbb1000100","title":"Mirka FBS-B 12V 3\/8-in. x 13-in. Cordless File Belt Sander, Tool Only (MBB1000100)","description":"\u003csection data-aplus\u003e\n  \u003cdetails id=\"product-features\" class=\"acc\" open\u003e\n    \u003csummary\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"features\"\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/motor-type.svg\" alt=\"motor-type\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eFast Weld Cleanup\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eBuilt for spot weld and weld seam grinding, this file belt sander removes material quickly without dragging an air hose around the job.\u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/weight.svg\" alt=\"weight\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eLight and Balanced\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eAt only 1.5 lbs without the battery, it is easier to control in awkward positions and less tiring during longer repair work.\u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"card\"\u003e\n          \u003cdiv class=\"card-inside\"\u003e\n            \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/connectivity.svg\" alt=\"connectivity\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eConnected Control\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eBluetooth connectivity with the myMirka app lets you monitor vibration, manage RPM range, and keep belt speed in check for more consistent results.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-overview\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\" data-product-summary\u003e\n      \u003cp\u003eThe Mirka FBS-B 10 Cordless File Belt Sander .375\"x13\" max 12V is a cordless file belt sander built for body repair, spot weld grinding, weld seam grinding, vehicle manufacturing, and restoration work. This is a file belt sander designed for fast metal grinding and surface prep in tight, hard-to-reach areas. Model Number MBB1000100 is the bare tool version, so it does not include batteries or a charger.\u003c\/p\u003e\n      \u003cp\u003eWhat matters here is how much access this tool gives you. A narrow 3\/8 in. by 13 in. belt lets you get into seams, edges, and localized repair areas where a larger sander is just too bulky. If you are cleaning up spot welds, knocking down weld seams, or removing paint and rust in confined sections, this setup is a lot more practical than trying to force a standard grinder or larger belt tool into the space.\u003c\/p\u003e\n      \u003cp\u003eThe brushless motor is a big part of why this Mirka cordless file belt sander makes sense for daily shop use. You get the power and service life benefits of a brushless design, along with quieter and smoother operation than many compact metalworking tools in this class. Mirka also calls out fast, aggressive material removal, which is exactly what matters when you are trying to move through weld cleanup without wasting time.\u003c\/p\u003e\n      \u003cp\u003eControl is another strong point. The tool uses speed setting buttons plus a stepless trigger, so you are not locked into one feel or one pace. That gives you better control when you need to ease into a seam, stay consistent on a visible repair area, or speed up when material has to come off quickly. Precise linear speed control helps keep the sanding action predictable across different surfaces and repair stages.\u003c\/p\u003e\n      \u003cp\u003eFor real jobsite and shop use, the cordless design is the main advantage. No air hose means less setup, less drag, and fewer restrictions around a vehicle, bench, or fabrication area. If you work in a shop where compressors are tied up, or you move between bays and mobile jobs, that freedom matters. The integrated LED light also helps when you are working inside body lines, around wheel openings, or anywhere visibility is limited.\u003c\/p\u003e\n      \u003cp\u003eMirka put some thought into daily usability too. The tool is light, balanced, and ergonomic, with a rubberized handle for a more secure grip over long sessions. It also includes a spark protection flap, a belt position adjustment knob for easier tracking, and an open belt protection system that makes abrasive belt changes faster. Those are small details until you are changing belts multiple times a day or working around finished surfaces that you do not want showered with stray sparks.\u003c\/p\u003e\n      \u003cp\u003eOn the system side, MBB1000100 works with Mirka 11.1V lithium-ion batteries used across other Mirka cordless tools, including cordless sanders, polishers, and the Mirka ANGOS ARG-B cordless grinder. That is useful if you are already on the Mirka cordless platform and want to keep battery management simple. Bluetooth connectivity adds another layer for users who want app-based monitoring and setup through myMirka.\u003c\/p\u003e\n      \u003cp\u003eThis tool is a strong fit for collision repair techs, metalworkers, restoration shops, and anyone doing detailed weld cleanup where precision matters more than brute size. If your work involves seams, spot repairs, rust removal, and controlled material removal in narrow areas, this is the kind of belt sander that earns its place fast. If you need a broad-area stock removal tool, look elsewhere. If you need reach, control, and cordless freedom for metal repair work, this one is built for it.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eGet Into Tight Repair Areas\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"row\"\u003e\n        \u003cdiv class=\"img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260623063_1.jpg\" alt=\"Mirka FBS-B 10 Cordless File Belt Sander .375x13 max 12V with narrow file belt arm for grinding weld seams and spot repairs in tight automotive metalwork areas\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eThe narrow belt arm is what makes this tool useful where larger sanders and grinders stop being practical. It is built for focused grinding and cleanup in narrow sections, seams, and localized repair spots.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003e3\/8 in. x 13 in. belt size helps reach confined work areas\u003c\/li\u003e\n            \u003cli\u003eDesigned for body repairs, spot weld grinding, and weld seam grinding\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits-2\" class=\"acc flip\"\u003e\n    \u003csummary\u003e\u003ch2\u003eWork Without Hoses Slowing You Down\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"row\"\u003e\n        \u003cdiv class=\"img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260623063_3.jpg\" alt=\"Mirka FBS-B 10 Cordless File Belt Sander .375x13 max 12V showing compact cordless body and belt arm for mobile metal grinding and restoration work\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eGoing cordless is not just about convenience. It gives you better freedom around vehicles, benches, and fabrication setups, especially when an air line would catch, drag, or limit your angle of attack.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003eBrushless motor delivers smooth, quiet operation with long service life\u003c\/li\u003e\n            \u003cli\u003eIntegrated LED light improves visibility in low-light repair areas\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits-3\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eDial In Belt Speed for Better Control\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"row\"\u003e\n        \u003cdiv class=\"img\"\u003e\n          \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/20260623063_2.jpg\" alt=\"Mirka FBS-B 10 Cordless File Belt Sander .375x13 max 12V handle with speed controls for precise metal sanding and weld cleanup\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eFine control matters when you are working on visible repair zones or trying to avoid over-grinding. The speed buttons and stepless trigger give you a more deliberate feel than a simple on-off setup.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003eAdjustable RPM settings help match tool response to the task\u003c\/li\u003e\n            \u003cli\u003eBluetooth connectivity works with the myMirka app for vibration measurement, RPM range management, and belt speed monitoring\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-key-specifications\" class=\"acc\" open\u003e\n    \u003csummary\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003ctable class=\"aplusspecs\"\u003e\n        \u003ctr\u003e\n          \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/sander.svg\" alt=\"sander\" class=\"aplusicon\"\u003e Tool Type\u003c\/th\u003e\n          \u003ctd\u003eCordless file belt sander\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/voltage.svg\" alt=\"voltage\" class=\"aplusicon\"\u003e Voltage (V)\u003c\/th\u003e\n          \u003ctd\u003e12V max\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/size.svg\" alt=\"size\" class=\"aplusicon\"\u003e Belt Size\u003c\/th\u003e\n          \u003ctd\u003e3\/8 in. x 13 in.\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/motor-type.svg\" alt=\"motor-type\" class=\"aplusicon\"\u003e Motor Type\u003c\/th\u003e\n          \u003ctd\u003eBrushless\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/power-source.svg\" alt=\"power-source\" class=\"aplusicon\"\u003e Power Source\u003c\/th\u003e\n          \u003ctd\u003eCordless battery\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/weight.svg\" alt=\"weight\" class=\"aplusicon\"\u003e Weight (lbs)\u003c\/th\u003e\n          \u003ctd\u003e1.5 lbs without battery\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/led-light.svg\" alt=\"led-light\" class=\"aplusicon\"\u003e LED Light\u003c\/th\u003e\n          \u003ctd\u003eIntegrated\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/connectivity.svg\" alt=\"connectivity\" class=\"aplusicon\"\u003e Connectivity\u003c\/th\u003e\n          \u003ctd\u003eBluetooth with myMirka app support\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-compatibility\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"compat-list\"\u003e\n        \u003cdiv class=\"compat-row\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/voltage.svg\" alt=\"voltage\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eBattery Platform\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eCompatible with Mirka 11.1V lithium-ion batteries used across other Mirka cordless tools.\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"compat-row\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/battery-capacity.svg\" alt=\"battery-capacity\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eBattery Options\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eWorks with 2.5Ah and 5.0Ah 11.1V Li-ion batteries. Batteries and charger are sold separately on this bare tool model.\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"compat-row\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/connectivity.svg\" alt=\"connectivity\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eApp Integration\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eBluetooth connectivity supports the myMirka app for vibration measurement, RPM range management, and belt speed monitoring.\u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-applications-uses\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eBuilt For\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"tags\"\u003e\n        \u003cspan class=\"tag\"\u003eAutomotive\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eBody Repair\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eVehicle Restoration\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eVehicle Manufacturing\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eSpot Weld Grinding\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eWeld Seam Grinding\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003ePaint Removal\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eRust Removal\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-pro-tips\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003ePro Tip\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"tip-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-lg\"\u003e\n        \u003cp class=\"tip-text\"\u003eIf you are doing short, detailed work in awkward positions, run the lighter 2.5Ah battery to keep the tool easier to handle. For longer weld cleanup sessions, step up to the 5.0Ah battery so you spend less time swapping packs.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-tool-nut-take\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eTool Nut's Take\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cdiv class=\"eyebrow\"\u003eTool Nut's Take\u003c\/div\u003e\n      \u003ch3\u003eMirka FBS-B 10 Cordless File Belt Sander Gets the Small Stuff Done Right\u003c\/h3\u003e\n      \u003cp\u003eThis is the kind of specialty metalworking tool that saves time because it reaches the places your bigger grinder cannot.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Collision repair techs, restoration shops, and metalworkers doing weld cleanup, rust removal, and tight-area sanding.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The narrow 3\/8 in. belt, brushless cordless design, light 1.5 lb body, and app-connected speed monitoring make it more capable than a basic compact grinder for detail work.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e MBB1000100 is the bare tool only, so plan on adding batteries and a charger if you are not already running Mirka cordless gear.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-faqs\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\u003c\/summary\u003e\n    \u003cdiv class=\"acc-body\"\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat is this tool mainly used for?\u003c\/strong\u003e It is designed for body repairs, spot weld grinding, weld seam grinding, vehicle manufacturing, and restoration work.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eIs this a corded, pneumatic, or battery-powered sander?\u003c\/strong\u003e It is a cordless battery-powered file belt sander, which makes it useful where air hoses or power cords are impractical.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDoes this model include batteries and a charger?\u003c\/strong\u003e No. Model MBB1000100 is the tool-only version.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCan it connect to the myMirka app?\u003c\/strong\u003e Yes. Bluetooth connectivity supports features such as vibration measurement, RPM range management, and belt speed monitoring.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e","brand":"Mirka","offers":[{"title":"Default Title","offer_id":53385918120230,"sku":"MBB1000100","price":436.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/20260623063_1.jpg?v=1782171893","url":"https:\/\/www.toolnut.com\/products\/mirka-fbs-b-12v-3-8-in-x-13-in-cordless-file-belt-sander-tool-only-mbb1000100","provider":"Tool Nut","version":"1.0","type":"link"}