Product description:1. Sizes: 0.3mm-3.5mm 2. long life time/longer durability 3. Ceritificate: ISO9001,SAE 4. Uniform size/Uniform Hardness/ Less/Small Dust 5. good security, better deburring, it is cylindrical before using it, and it will be ball after that. 6. we are manufacturer we can ensure the products quality ,competitive price and punctual delivery ,Besides Also we can offer you free technical direction, Help you reduce Cost and make more profite .