- The Cat 40 Taper of the blanks is machined, hardened and ground
- Blank end remains soft and can be machined to your specific needs
- Blank end can be flame hardened after machining
- Exceed current industry standards for optimum performance
- Produced from mill certified A.I.S.I 4150 pre-heat treated steel
- This product requires a Retention Knob fitted to your machine specs. These are available through Fitz-Rite Products.