The TEKTON 1/2 Inch Drive x 3 Inch Impact Extension 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 stuck on fasteners. The through-hole in the drive end locks onto the tang of impact drivers. Made from premium 6140 Cr-V steel, it is precisely heat treated for superior strength and protected by a corrosion-resistant manganese phosphate finish.