Check the listing for details. 100Pcs Wool Felt Mandrel Mounted Polishing Bits Kit Grinding Buffing Wheel Set. Condition: New. Listed at 26.64 USD. Descriptions:The wool felt polishing buffing wheels are made of wool (polishing head) and metal (mandrel). The wool is even and delicate, elastic, wear-resistant, and durable, and the mandrel has high hardness and is not easy to break.For buffing, lapping, and mirror polishing to make the polished goods cleaner and brighter, use with electric drills, electric grinders, air grinders, grinders, or rotary tools.Suitable for various mold, glass, metal, and non-metal surfaces, and grooves, such as watches, cars, jewelry, trigger operations, etc.Note: Please do not run in excess of 30,000 R.P.M.Specifications:Head Diameter: 4mm / 0.16 inch, 5mm / 0.2 inch, 6mm / 0.24 inch, 8mm / 0.31 inch, 10mm / 0.39 inchHead Length: 12mm-18mm / 0.47 inch-0.71 inchShank Diameter: 3mm / 1/8 inchTotal Length: 42mm-50mm / 1.65 inch-1.