ITEM NAME:8pcs/Kit Impact Grade Socket Adapter Extension Set Turns Power Drill Hand Tool Descriptio n Description: Each socket adapter is made of heat-treated vanadium steel and black oxide coating with bracket torque compression to meet standard operating.1/4" hex shank for all quick change drill chucks. Four 1/4" drives, two 3/8" drives, and two 1/2" drives. The spring ball bearings on each square head are securely locked in the socket to avoid slipping during use.
