This 3/8-Inch drive, 42-Piece set is forged from the finest Molybdenum alloy steel-the best choice for strength and durability. Blow molded storage fits into most tool boxes and has a built in carry handle for convenient transport. Set Includes: 8 Std Length SAE: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4-Inch 8 Deep Length SAE: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4-Inch 12 Std Length Metric: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm 12 Deep Length Metric: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm 1 pc 3/8-Inch Dr. Universal Joint 1pc 3-Inch Extension.