Light and easy to hold, the Perma-Grit® Flat Sanding & Contour Blocks come in 7 standard sizes and are made from anodised aluminium extrusion. A truely flat sander that will not warp. They are great for straight edges and sand a perfect right-angle when placed on their side. A must for scratch & kit builders. Also great for DIY and woodworking.

The Perma-Grit® Sanding Blocks have coarse grit on one side and fine grit on the opposite side. 

The Perma-Grit® Swop Blocks have interchangeable sanding sheets with Grit from Fine to XXCoarse. The black plastic holder has a felt backing pad and wing nut for attaching the sanding sheet.