This product may be intended for use by a health care professional use only. The seller may ask you to evidence you are a qualified health care professional entitled to buy and use such products in your country. Feature: 1. FG 1.6mm for high speed handpiece 2. For dental use only , Can not use for nail polish 3. Natural emery powder, high hardness, it can make sure bur sharpness. 4. High-grade stainless steel stalk, high strength, no rusty. 5. It could be disinfected under the high temperature and high pressure. 6. The maximum allowable speed is to 400,000/min. Packing:10pcs/set