Klein Tools' Impact Socket Adapter is a must-have for lineman and utility workers. It features an improved ball detent which stays in the socket better and has greater separation force. When combined with Klein Tools' Impact Socket, it provides even more versatility with four available socket sizes to work with.Features Improved Ball Detent 7/16-Inch hex quick-release adapter for Cat. No. NRHD4 Black phosphate for corrosion resistance Overall length: 2-15/32-Inch (6.3 cm) 1/2-Inch male square, works with a 7/16-Inch impact driver Adapter sold individually and included with the 4-in-1 Impact Socket (NRHD4) Lock pin secures socket WarningsAlways wear approved eye protection. Socket Size: 1/2 in Male Square Drive Size: 7/16 in hex Overall Length: 2.75 in (7 cm) Depth: 2.475 in Height: 0.45 in Overall Width: 0.625 in (1.6 cm) Material: Steel, Black Phosphate Weight: 0.18 lbs Type: Impact Socket Adapter Standard: ASME B107.4 DownloadsSpec Sheet