PFERD Abrasives Grinding bit 609979 - PFERD 31707253, The PFERD 31707253 Steel grinding point ball features a 16 mm diameter and is included in a pack of ten. It is designed as a grinder attachment for precision grinding operations. Typical applications include surface smoothing and material removal in metalworking projects. PFERD 31707253 steel Grinding ball 16mm 10pcs deburr contours easily