- MAS BT30 Retention knobs for BT30 Tool Holders
- Works on all BT 30 machines
- For MAS BT30 Spindles
- Threaded is M12 X1.5
- All critical surfaces precision ground
- Made from alloy steel hardened to 54 - 56rc
- Thru twice heat treatment of each pull stud
- Angle degree have 45,60 and 90 available
- Concentricity is less than .0005 at collet face
- Coolant available
- Rear thread for pull stud is M12x1.5
- Oxide black
