Resin bond abrasive cutting discs, grinding wheel flap disc coated abrasives, by using materials Brown Aluminium Oxide(A); Black Silicon Carbide(C); Zirconia Alumina(Z); white Alunimium Oxide(WA); Green Silicon Carbide(GC); Aluminum Oxide/Silicon carbide(AC); Zirconia Alumina/Aluminum Oxide(ZA), with types of T41, T42, T27, T29 at max. speed 80/s RPM for professional users