Proto TorquePlus Socket, Deep Length, Series, Yes Impact Rated, Measurement System, Square Drive, Drive Size, in 1, Socket Size, in 3-3/4, 6-1/4 Overall Length, Opening Depth in, in 2-1/2, 3-1/4 Drive End Width, Socket End Width in, in 5, Side Locking Hole Locking, Number of Points, Bolt Clearance Depth, in 3-7/8, Alloy Steel, Finish