● Integrated design, taper shank and drill chuck are integrated, compact structure, eliminating accumulated tolerance, high precision
● Loosen and clamping by manual, easy and fast operating, saving clamping time
● Gear transmission, strong clamping torque, no slipping while working
● Ratchet self-locking, drilling and tapping can be used
● Used for bench drill, rocker drill, drilling and tapping machine, lathes, milling machine, etc.