3PCS 80/120/140MM 1/4" HEX SHANK FLEXIBLE LENGTH BIT HOLDER SET 3pcs quick release screwdriver extension bits holders with 1/4" quick-change hex shanks fit any standard size screwdriver bit, 1/4" impact drivers and hand-held drivers. Change external six angle into internal six angle - Strong Practicability. High hardness & non-slip, large torque & long life and durable. The screwdriver head can lock the connecting rod . Great for exchanging the sleeve and the joint, prolonging the connecting rod. Used to join electric screwdriver, screwdriver, screwdriver nozzle, screwdriver head. Suitable for electric, pneumatic screwdrivers and other screwdriver bits of power tools, drill extended. 80mm 1/4" hex shank bits holder: flexible length 80-120mm, weight 27g 120mm 1/4" hex shank bits holder: flexible length 120-200mm, weight 42g 140mm 1/4" hex shank bits holder: flexible length 140-250mm, weight 48g