{"product_id":"mirka-coarse-cut-2-3-4-in-x-16-1-2-in-40-grit-grip-file-sanding-sheet-aluminum-oxide-40-663-040","title":"Mirka Coarse Cut 2-3\/4-in. x 16-1\/2-in. 40 Grit Grip File Sanding Sheet, Aluminum Oxide (40-663-040)","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\/grit-range.svg\" alt=\"grit-range\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eFast Stock Removal\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eThe coarse 40 grit cuts aggressively for stripping, leveling, and rough prep work, so you can move through filler, lacquer, and weld cleanup faster.\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\/material.svg\" alt=\"material\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eReinforced Paper Backing\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eMirka uses a specially reinforced paper backing to support the abrasive grain and hold up better during heavy sanding, especially around edges.\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\/sander.svg\" alt=\"sander\" class=\"aplusicon\"\u003e\n          \u003c\/div\u003e\n          \u003cdiv\u003e\u003cstrong\u003eMirka Grip File Sheet Fit\u003c\/strong\u003e\u003c\/div\u003e\n          \u003cdiv class=\"feature-card\"\u003eThe Mirka 40-663-040 Grip File Sheet is built for file sanding applications where a long narrow sheet helps you reach flat panels and work evenly across repairs.\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 \u003cstrong\u003eMirka 40-663-040 Grip File Sheet\u003c\/strong\u003e is a coarse abrasive file sheet for bodywork, paint prep, filler shaping, and general heavy sanding. This is a sanding sheet designed for coarse material removal and surface prep. Model Number: \u003cstrong\u003e40-663-040\u003c\/strong\u003e. With its 16-1\/2 inch by 2-3\/4 inch format and 40 grit aluminum oxide abrasive, it is aimed at users who need fast cutting action more than a fine finish.\u003c\/p\u003e\n      \u003cp\u003eWhat matters here is how it works in rough prep stages. A 40 grit sheet is for knocking material down quickly, not for final finish sanding. That makes this sheet a practical choice for cutting through lacquer, leveling putty, cleaning up welding seams, and working on glass reinforced polyester where slower abrasives waste time. If the job starts with heavy correction, this is the kind of grit you reach for first.\u003c\/p\u003e\n      \u003cp\u003eMirka backs the abrasive with reinforced paper to improve grain support and durability. In real use, that means the sheet is better able to keep cutting without the edge breaking down as quickly as lighter backing materials can. The product description also calls out reduced edge wear and minimal clogging, which matters when you're sanding filler, coatings, or other materials that can load up a sheet and kill performance early.\u003c\/p\u003e\n      \u003cp\u003eThe semi-open coat is another practical detail. It helps produce a more consistent scratch pattern while resisting loading, so the abrasive stays useful longer during coarse sanding. That is especially helpful when you're doing long strokes on a file board or sanding block and need the cut to stay even across the full length of the sheet.\u003c\/p\u003e\n      \u003cp\u003eBecause this is a grip file sheet, it is intended for sanding tools or hand sanding setups that accept grip-style file sheets in this size. The long narrow shape makes it well suited to straight runs, panel repairs, and surface leveling where a standard round disc is not the best fit. The paper backing also gives it enough flexibility for rounded surfaces while still supporting aggressive cutting.\u003c\/p\u003e\n      \u003cp\u003eWho should buy it? Auto body techs, painters, metal fabricators, and serious DIY users doing repair prep will get the most out of it. If you need a fine finish-ready sanding sheet, this is not that product. If you need a Mirka abrasive sheet that removes material quickly and stands up to coarse sanding work, this one makes sense.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails id=\"product-benefits\" class=\"acc\"\u003e\n    \u003csummary\u003e\u003ch2\u003eBuilt for Heavy Surface Prep\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\/20260623198_2.jpg\" alt=\"Mirka 40-663-040 Grip File Sheet coarse sanding sheet for body filler and weld seam surface prep on long flat repair areas\" class=\"tnblock-img\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"copy\"\u003e\n          \u003cp\u003eThis file sheet is made for the rough stage where speed matters. The long format helps cover more surface with each pass, and the coarse aluminum oxide abrasive is tuned for fast cutting on demanding prep work.\u003c\/p\u003e\n          \u003cul\u003e\n            \u003cli\u003e40 grit abrasive for aggressive stock removal\u003c\/li\u003e\n            \u003cli\u003eSuitable for lacquer, putty, glass reinforced polyester, and welding seams\u003c\/li\u003e\n            \u003cli\u003eReinforced paper backing for better durability during coarse sanding\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\u003eSize\u003c\/th\u003e\n          \u003ctd\u003e16-1\/2 in x 2-3\/4 in\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eGrit\u003c\/th\u003e\n          \u003ctd\u003e40\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eGrit Type\u003c\/th\u003e\n          \u003ctd\u003eCoarse\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eAbrasive Material\u003c\/th\u003e\n          \u003ctd\u003eAluminum Oxide\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBacking Type\u003c\/th\u003e\n          \u003ctd\u003ePaper\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eAttachment Type\u003c\/th\u003e\n          \u003ctd\u003eGrip\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth\u003eItem Weight\u003c\/th\u003e\n          \u003ctd\u003e0.2 lbs\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\/sander.svg\" alt=\"sander\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eTool Interface\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eDesigned as a grip file sheet for sanding tools or hand sanding blocks that accept 16-1\/2 in x 2-3\/4 in grip-style file sheets.\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\/material.svg\" alt=\"material\" class=\"icon-sm\"\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eWork Materials\u003c\/strong\u003e\n            \u003cdiv class=\"compat-detail\"\u003eSuitable for coarse sanding on lacquer, putty, glass reinforced polyester, and welding seams.\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\"\u003ePaint Prep\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eMetalworking\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eFiller Shaping\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eWeld Cleanup\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eComposite Repair\u003c\/span\u003e\n        \u003cspan class=\"tag\"\u003eDIY \/ Hobbyist\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\"\u003eUse the Mirka 40-663-040 Grip File Sheet for the first shaping pass, then step to a finer grit before primer or finish work. That saves time because the 40 grit removes material fast, but it is intentionally too aggressive for final surface refinement.\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 40-663-040 Grip File Sheet Means Business\u003c\/h3\u003e\n      \u003cp\u003eThis is the kind of abrasive you buy when you need to remove material now, not baby the surface.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Auto body techs, fabrication shops, painters, and DIY users doing rough shaping and repair prep.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The reinforced paper backing, semi-open coat, and coarse 40 grit setup are built for aggressive sanding without giving up durability too early.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e This is a rough-prep sanding sheet, so plan on following it with finer grits if the job needs a finish-ready surface.\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 kind of abrasive is used on this sheet?\u003c\/strong\u003e It uses aluminum oxide abrasive.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat grit is this sanding sheet?\u003c\/strong\u003e It is a 40 grit coarse sanding sheet.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat jobs is it suited for?\u003c\/strong\u003e It is intended for coarse sanding tasks such as lacquer sanding, putty shaping, glass reinforced polyester work, and welding seam cleanup.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eWhat size is the sheet?\u003c\/strong\u003e The sheet measures 16-1\/2 inches long by 2-3\/4 inches wide.\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":53385914253606,"sku":"40-663-040-MIRKA","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/20260623198_1.jpg?v=1782171890","url":"https:\/\/www.toolnut.com\/products\/mirka-coarse-cut-2-3-4-in-x-16-1-2-in-40-grit-grip-file-sanding-sheet-aluminum-oxide-40-663-040","provider":"Tool Nut","version":"1.0","type":"link"}