... its particularly suited for cleaning oxide skin, pre-treatment of surface or reinforcement.(3) ≥60HRC:High hardness, sharp ... no pollution, has no casting defect .Forged state, High mechanical properties, angular shape is more sharp. high efficiency, The paint ... 3.Improve worke fficiency. Bearing alloy angular steel grit is of good metallographic structure, uniform hardness, long anti-fatigue life ...