The SHOCKWAVE™ lineman's 9/16 in. to 3/4 in. 6PT 2-in-1 socket is design to increase efficiency and safety for lineman. With an anti-rust stainless steel spring loaded design, it is the most durable 2-in-1 socket design and provides hands-free changes. The 6PT design will fit all 9/16 in. and 3/4 in. hex hardware connections without stripping the hardware. A 7/16 in. to 1/2 in. impact adapter is included.