1. Integrated design with CAT40 shank achieving high precision and rigidity.
2. Self-tightening  key-less feature automatically increasing gripping force.
3. Made of alloy steel with special quenching treated key parts increases durability.
4. Design for CNC machine. 
5. Balanced to: G2.5@20,000 RPM
6. Draw Bar Thread: 5/8"-11 
7. Clamping Range: 3/32" - 5/8".
8. Shank Taper: CAT40.
9. Gage Length: 3.93"
10. Accuracy: 0.00197"