Walter 3-Inch Spin-On Flap Disc 120 Grit

Master the Details with Walter Spinlock

When you are welding in tight spots, a standard angle grinder just won't cut it. That is where the Walter Spinlock Flap Disc (SKU: 09A312) comes in. This 3-inch powerhouse is designed to get into those annoying nooks and crannies that usually require hand sanding or awkward tool positioning. With a fine 120 grit, this disc is your go-to for making your work look professional. It is perfect for blending out small TIG welds, cleaning up splatter in corners, or prepping a surface for a final polish or paint job.

Quick Changes, Less Downtime

We know that time is money in the shop. The "Spinlock" feature on this disc utilizes a quick-change plastic button (often referred to as Type R or TR style) that lets you swap out discs in a literal snap. You just spin it off and spin the new one on—no wrenches, no keys, no hassle. This means you can switch from a coarser grit to this 120 grit finishing disc in seconds, keeping your workflow smooth and uninterrupted. It attaches securely to your die grinder's backing pad, so you never have to worry about it flying off at high RPMs.

Smooth Operation on Any Metal

Whether you are fabricating a custom stainless exhaust, repairing an aluminum boat part, or just cleaning up some mild steel brackets, this disc handles it all. Walter has engineered the abrasive cloth to be tough enough for steel but cool-running enough to prevent heat discoloration on stainless steel. The flap disc design offers a softer touch than a solid grinding wheel, allowing the abrasive to contour slightly to the workpiece. This prevents gouging and undercutting, which is critical when you are doing finish work with 120 grit.

Why Choose Flap Over Flat?

Unlike flat sanding discs that can wear out instantly and heat up quickly, the layered flap design of the 09A312 constantly exposes fresh abrasive grain as you work. This results in a consistent cut rate and a much longer life for the disc. You get the aggressive cut of a grinding wheel with the finish of a fiber disc, all in one. Upgrade your die grinder setup with Walter's premium abrasives and see the difference in your final product.