3 pieces set with different length (60mm, 100mm, 150mm)
Made of industrial quality CR-V(Chrome vanadium steel), high hardness and large torque with anti-skid roll pattern. Safe Operation!
Interface has a locking mechanism, the screwdriver head can lock the connecting rod with strong magnetic. Quick change and release system allows you to quickly install, lock and unlock the bit easily
1/4" hex shank (6.35mm)can be easily fit into power driver, drill and hand-held screwdriver, for extending all kinds of screwdriver bits, screwdriver head conversion uses
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