... or reinforcement.(3) ≥60HRC:High hardness, sharp edges remain during operation, mainly used for marble cutting,characters: stable and reliable performance ... ,even size , good abrasion resistance,more sharp for cutting, cut fast, and make the marble with a more ... , and operator and workers’ health. Abrasive bearing steel grit made in China , skype:qt.1131 QQ:1742625742 Tel:008615966055683