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 .