Perma-Grit Sanding Block Wedge 140mm x 51mm Coarse / Fine Grit WB140 PermaGritPerma Grit Sanding Block Wedge 140mm x 51mm coarse fine grit WB140 Overall sanding area 140mm x 51mm. Block made with 45 degree angle to reach into tight corners. Coarse grit one side Fine grit opposite side. The Wedge Block is cut at and angle of 45 Dims. approx. 185 x 52 x 41mm. The wedge shape enables the user to see clearly where they are sanding, and to sand into tight corners without knocking your knuckles. Flat sanding surface, coarse grit one