4mm(ID diameter) x 12mm(nose end diameter) x 70mm(Gage Length)

* Maximum 0.0002" TIR or better. 

* Balanced to G2.5/25000RPM.

* 360 degree tool grip along the entire length of bore resulting in an evenly distributed clamping force and superior concentricity.

* Ideal for end milling, drilling and other critical rotary tool applications.

* No need wrenches, Collets, set screws and other accessories.

* Coolant thru.

*  5/8"-11  thread