** The tool shank and precision keyless drill chuck are combined one body, so that the drill chuck will not be fallen/slipped out when heavy cutting is being performed.
** Reversible faction permits clockwise and counterclockwise turning.
** High gripping torque, the drill will not be fallen out when the machine main spindle is instantly stopped.
** Short and compact design. The run-out is within 0.05mm for drilling, reaming, and tapping.
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