Our SHOCKWAVE™ Lineman's 3/8"" & 1/2"" 12PT 2-in-1 Socket is designed to increase efficiency and safety for Lineman. This 2-in-1 socket is the most durable with an internal anti-rust, stainless steel spring-loaded design. The 12PT design will fit both will fit all 15/16""and 1 1/8"" hex and square hardware for increased versatility and provides hand-free changes. A 7/16"" to 1/2"" impact adapter is included. This MILWAUKEE® socket set features a pin detent hole for locking onto pin detent tools and adapters for maximum jobsite productivity.