Bullet Shape Rotary Grinding Stone Set (3 Pcs Set)Bullet Shape Rotary Grinding Stone Set Shank Abrasive Mounted Stone Grinding Point Polishing Bits Polishing Grinding Stone Buffing Wheels Head Rotary Tool for Grinding, Polishing (3 Pcs Set) Description : This mounted stone grinding bits is made of high quality red corundum sand, It is more durable and not easy to wear. Suitable for polishing and grinding a variety of objects, such as stone, glass, metal, stainless steel, gems, ceramics, etc. Abrasive