The Jacobs high torque/high precision chuck with integrated shank features a high precision keyless drill chuck – arbor is integrated into the internal socket of the drill chuck. The integrated design of the Jacobs high torque/high precision chuck with integrated shank, makes it impossible for the arbor and the drill chuck to become accidently separated, providing a unit of greater rigidity and precision as a result of its compact design, accumulated run-out is reduced to a minimum.The self-tightening feature of the Jacobs high torque/high precision chuck with integrated shank automatically increases gripping force proportional to increased torque to prevent tool shank slippage. Right handed operation only. The Jacobs high torque/high precision chuck with integrated shank is 100% individually controlled to ensure not to exceed a maximum total integrated run-out of 0.0016”. Mounts available: morse tapers, straight shanks and r-8.