Features: High hardness non-slip, large torque long life and durable. The screwdriver head can lock the connecting rod with strong magnetic. Change external six angle into internal six angle - Strong Practicability. Great for exchanging the sleeve and the joint, prolonging the connecting rod. 1/4 quick-change hex shanks fit any standard size screwdriver bit, 1/4 impact drivers and hand-held drivers. Widely used in situation of narrow space, to reach the work-place where hands can not reach.
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