1/32-1/2″ BT40 Ultra Precision Integral Locking Drill Chuck ~ Suitable for CNC and high precision machine applications. ~ High precision and concentricity. ~ Right and left rotation. ~ High gripping force with effortless tool clamping. ~ Short and sturdy design with the tool shank and chuck forming one unit. ~ Quick tool change inside or outside of machine. ~ No unintentional opening in case of sudden spindle stop or change of direction. ~ Tightening wrench included. ~ Manufactured and tested at a world class factory that produces the highest quality European Brands like Babel. ~ Runout test of drill chucks is done with a torque of approximately 12 Nm using 6mm, 8mm, 12mm & 16mm mandrels. ~ T.I.R. is <0.0012″.