Techniks part #22225 Balanced to 25,000 RPM at G2.5. Dimensions for length (l1) 2.76" and diameter (D) 1.08" T.I.R. 0.0001" measured from taper to collet pocket.

Special Power Coat nut holds up to 75% tighter for best T.I.R., rigidity, and safety allowing reduced vibration at high speed to extend tool life. Techniks certified for accuracy and balance.