Proto® TorquePlus™ Socket, Deep Length, Yes Impact Rated, Measurement System: Metric, Square Drive, 3/8 in Drive, 8 mm Socket, 69.9 mm Overall Length, 8 mm Opening Depth, 17.3 mm Drive End Width, 13 mm Socket End Width, Side Locking Hole Locking, 6 Points, 57.2 mm Bolt Clearance Depth, Alloy Steel, Black Oxide