Manufactured to DIN 69880. Suitable for use in NC lathes with VDI fixing disc. Features: All tools are fully carburized and hardened. Surface hardness of 58-60HRc. Tensile strength above 1000N/mm2. Surfaces blued; seat, parallel shank and shoulder ground. Tools can be adjusted in-situ on radial and axial toolholders. Seat shim allows two tool sizes to be used with one toolholder. Ball regulator (bullseye) provides easy coolant control.