For HSD Spindle CNC Router: Biesse, Bermag, Bussellator, CNT, DMS, CR Onsrud, Masterwood, Thermwood, and Holz-her
Made from alloy steel 5155 with heat treat to RC 56-58
Each retention knob is individually magnetic particle tested to ensure free of crack
High quality black oxide finish to ensure long enduring tool life
Fully ground on all critical surface including a pilot under the flange of retention knob for full contact between tool holder's taper end and retention knob