High Torque/High Precision Keyless Chucks with Shank, Jacobs R8

High precision keyless drill chuck - arbor is integrated into the internal socket of the drill chuck. This integrated design makes it impossible for the arbor and the drill chuck to become accidentally separated, providing a unit of greater rigidity and precision. As a result of its compact design, accumulated run-out is reduced to a minimum. Self-tightening feature automatically increases gripping force proportional to increased torque to prevent tool shank slippage. Right handed operation only.