... :8000rpm Hardness:48-52HRC International quality standard. IGESHI brand R8 drill chuck without keyless Specification:1. We have series good clamping ... drill chuck withour key,such as BT,NT,CAT etc.2. ... from 20mm t0 200mm .5. Applied for end mill,drill bits,drill reamers taps and can clamp any straight cutters and tools ...