Grinding wheel, carbide wheel, typhoon wheel, 115 mm diameter covered with carbide tips. The tips are shaped so that the material dissolves well. Therefore, the disc does not fill up during use. Suitable for stone up to Mohs 4, wood and plastic. The disc can be used up to a hardness of 3 to 4 on the Mohs scale. Maximum speed 12,500 rpm. art. SD490