Dewalt, 23 Piece, 1/2" Drive, Impact Socket Set, Set Includes: (20) 1/2" Drive 6 Point Impact Sockets: 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm, 22mm, 24mm, (1) 1/2" Drive 5" Impact Extension, (1) 1/2" Drive Drill Adapter, (1) 1/2" Drive Quick Release Ratchet, The Sockets Include DirectTorque Technology To Help Prevent Rounding Of Fasteners & To Provide Better Grip.