... steel grit is angularity , the grit is gradually grinded to be round in use, its particularly suited for cleaning oxide skin ... Sphere arcProduction skillBearing steel crushed, double quenchingFused and cast to be steel shot, then crush the steel shot, single quenchingDensity≥7 ... high impact and wearing resistance, etc. This allows it to be recycled, help users to save steel grit consumption by 30%. 4 ...