This 95Pcs Polishing Grinding Bits Set with 2 shaped and 5 common sizes, is sure to satisfy you. Great for rough polishing, fine polishing and mirror polishing of various workpiece. Used for carving, grinding and polishing to make the polished goods cleaner and brighter. Perfect for metal, jade, various molds, glass, medical equipment, gold and silver jewelry, non-metallic surfaces, etc. Designed with mandrel mounted 1/8-inch shank, can be used with electric pneumatic drills, grinders, hanging mills, or other rotary tools. Specifications: Shank diameter: 1/8 inch(3mm) Head diameter: 4mm/ 5mm/ 6mm/ 8mm/ 10mm Materials: Abrasive Stone Head Shape: 50pcs Cylinder shaped and 45pcs Bullet shaped.