Accepts 75PG / 75TG COLLET SERIES - .031-.750" (.8-19MM) Collet seat taper T.I.R. 0.0002" Collet face within 0.06 of nut face for maximum rigidity. Through-spindle coolant capability. Collet can be removed with single hand. No tooling required and improved collet life. Parsymmetry design for high-speed operation. Made in USA! I have a New 3/4" Collet for this chuck I would sell with it for $10 (I paid $18 for them)