The Mirka DEROS 350X CV Electric Random Orbital Sander is a compact 3 inch corded finishing sander built for detail work and hard-to-reach sanding areas. This is a random orbit sander designed for fine finishing and controlled sanding in tight spaces. Model MID3502011US, this Mirka sander uses a 5 mm orbit, a brushless motor, and a lightweight 1.8 lb body to give professional users strong cut with better control where larger sanders feel bulky.

On the job, the combination of a 3 inch backing pad, 5 mm orbit, and up to 10,000 RPM makes this a balanced choice for both stock removal and finish prep. That 5 mm orbit matters because it gives you enough movement to keep sanding efficient, but it still stays controlled for finer surface work. If you are working a small repair area, curved panel, edge, or inside contour, the smaller pad helps you keep the abrasive where you need it instead of letting the tool drift onto surrounding surfaces.

Mirka built this unit around a brushless electric motor, and that is one of the main reasons pros buy into the DEROS platform. A brushless setup helps deliver steady performance while reducing wear points found in more conventional motor designs. Mirka also calls out constant speed under high pressure, which is a real-world benefit when you are leaning into the tool during heavier sanding passes and do not want the finish quality to change because the pad starts slowing down.

The body design is another big part of the appeal. The DEROS line is known for a low, flat profile, and this model follows that formula with a reported height of about 3.9 inches. That lower center of gravity makes the tool easier to guide with precision, especially on vertical work, small panels, and surfaces where you want the sander to feel planted instead of top-heavy. The symmetrical layout also makes it comfortable for both left-handed and right-handed users, and the extended body gives you space for two-handed control when you want a little more stability.

For jobsite practicality, Mirka includes soft start, an electronic motor brake, and variable speed control. Soft start keeps the tool from jumping hard at startup, which helps when you are setting the pad down on a finished surface or a small repair spot. The electronic brake helps stop the pad faster when you are moving between tasks. Variable speed control matters because not every sanding job wants full speed. Fine finishing, sensitive materials, and edge work often go better when you can dial the tool back and keep the scratch pattern more controlled.

Dust management is a major selling point here. Mirka positions this as a dust-free sanding machine, and that is a big deal for anyone working in refinishing, interiors, or production spaces where airborne dust slows everything down. Better dust collection means a cleaner work area, less cleanup, and better visibility of the surface while you sand. It also helps your abrasive work more effectively by clearing debris instead of letting dust load up the disc and fight the cut.

This sander also adds connectivity features that are unusual in this category. The built-in vibration sensor and Bluetooth connection let the tool work with the myMirka app for real-time vibration monitoring. That is not a gimmick if you sand all day. It gives shop owners and full-time users another way to track exposure and make smarter decisions about workflow and tool use over long stretches.

The Mirka DEROS 350X CV Electric Random Orbital Sander is a strong fit for automotive refinishing, detail sanding, spot repair, and any finish work where a standard random orbit sander is just too large. If you do broad panel sanding all day, a larger pad size may be the better primary tool. If your work regularly involves smaller surfaces, repair zones, contours, and precise finish prep, this is exactly the kind of sander that earns its keep fast.

Mirka DEROS 350X CV Electric Random Orbital Sander for precise sanding work

This is the kind of detail sander that makes sense the minute you stop forcing a full-size machine into small, awkward sanding jobs.

• Who it's for: Pros and serious users doing automotive refinishing, detail sanding, finish prep, and repair work in tight spaces.
• Why it stands out: The 3 inch size, 5 mm orbit, brushless motor, low-profile body, and 1.8 lb weight give it a rare mix of control, comfort, and real sanding performance.
• Worth knowing: This is a specialized random orbit sander, not your do-everything large-area machine. If your work is mostly small panels, curves, and spot repairs, that is exactly why it is worth buying.

• Is this a corded or cordless sander? It is a corded electric sander designed for 110 V power.
• What size pad does it use? This model uses a 3 in. (77 mm) backing pad.
• What is the orbit size? The orbit size is 5 mm, which gives a balanced mix of sanding speed and finish control.
• Does it support app connectivity? Yes. It has Bluetooth connectivity and works with the myMirka app.
• Is it made for tight spaces? Yes. Mirka positions this model as a solution for hard-to-reach areas, and the compact 3 inch format is intended for that kind of work.