... for cleaning oxide skin, pre-treatment of surface or reinforcement.(3) ≥60HRC:High hardness, sharp edges remain during operation, mainly used for marble cutting ... performance,even size , good abrasion resistance,more sharp for cutting, cut fast, and make the marble with a ... and workers’ health. Abrasive bearing steel grit used for marble cutting,rust cleaning etc , skype:qt.1131 QQ:1742625742 Tel: ...