Premium extra coarse 1500 grit diamond paper bonded to Diaface flexible plastic plate, 70mm. Polishing and deburring ability of a stone combined with the cutting ability of a file! Perfect for touching up edges and removing burrs on-hill for enhanced performance (especially when skiing or riding on agressive man-made snow) or to smooth and polish edges after filing. For best results use wet (immerse in a cup of water occasionally when using stone to clear swarf build-up) and place in file holder or guide to maintain an accurate edge angle.