Proto TorquePlus Socket, Deep Length, Series, Yes Impact Rated, Measurement System, Square Drive, Drive Size, in 1, Socket Size, in 3-1/4, 5-5/8 Overall Length, Opening Depth in, in 2, 2-3/4 Drive End Width, Socket End Width in, in 4-17/32, Side Locking Hole Locking, Number of Points, Bolt Clearance Depth, in 3-5/8, Alloy Steel, Finish