Made of a new composite material of ceramic fibres and thermosetting resin. Excellent for grinding and polishing of alloyed and non alloyed tool steels, cast iron, various alloy metals, copper, aluminium, silicon, stones, plastics etc. Extremely long life practically non-clogging and almost unbreakable allows these stones to be manufactured in very thin cross sections. Suitable for hand, mechanical and ultrasonic machines. Type: Flat Size: 1 x 2 x 100mm Grit: 400 Orange