Proto® TorquePlus™ Socket, Standard Length, Yes Impact Rated, Measurement System: Imperial, Square Drive, 1 in Drive, 2-1/4 in Socket, 3-1/4 in Overall Length, 1-21/32 in Opening Depth, 2-3/8 in Drive End Width, 3-5/16 in Socket End Width, Side Locking Hole Locking, 6 Points, 2-1/8 in Bolt Clearance Depth, High Alloy Steel, Black Oxide