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- This BT50 End Mill Holder accepts all .500 shank tooling
- Made from alloy steel hardened to 54 - 56rc
- Balanced to G2.5 at 20,000 rpms
- All critical tool holder surfaces precision ground
- Gage length is 2.625 inches
- Concentricity is less than .0001
- Rear thread for pull stud is M24 X 3.0