16 Piece SetUni-Fit System Fits Metric (8mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 21mm And 22mm), SAE (5/16", 3/8", 7/16", 15/32", 1/2", 9/16", 5/8", 11/16", 23/32", 3/4", 13/16" And 7/8"), External Torx (E10, E12, E14, E16, E18, E20, E22, E24, E26 And E28), Spline (M12, Pass-Thru Socket System Works On Long Bolts And Threaded Rod Where Normal Ratchets And Sockets Bottom OutHigh Polished Chrome Vanadium Steel ConstructionComes With Adaptor To Quickly Convert Driver To 3/8" Square For Use Of Standard SocketsHigh-Density Polyethylene Case Is Strong And Durable And Keeps Tools OrganizedNot For Use With Pneumatic And Electric Impact WrenchesMirror Polish For Easy Tool Cleanup After UseMeets Or Exceeds ANSI Standards