Work faster and avoid unnecessary disassembly steps with the TEKTON 1/2 in. Drive x 3 in. Impact Extension. Engineered for use with impact drivers, it reaches past obstructions or into tight, narrow spaces and delivers the torque needed to break loose stubborn fasteners. A spring-loaded detent ball securely latches onto sockets, preventing them from being dropped or left sticking on fasteners. The through-hole in the drive end locks onto the tang of impact wrenches or drivers. To protect against rust and corrosion, the black oxide finish absorbs and holds oil, repelling moisture.