8pcs Socket Adapter Impact Hex Shank Drill Bits Power Extension Bar Set

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Item Dimensions LxWxH: 3.5 x 2 x 0.65 inches Size: 1/4" 3/8" 1/2" Material: Chrome Vanadium Steel Drive System: Hex, Square -Each socket adapter is made of heat-treated vanadium st eel and black oxide coating with bracket torque compression to meet standard operating conditions -1/4" hex shank for all quick-change drill chucks. Four 1/4" drives, two 3/8" drives, and two 1/2" drives. The perfect size makes it compatible with all brands of electric drill and screwdriver handle tools. -An external weatherproof coating provides additional protection against damage. Show more