About this itemHigh quality forging, forged from heat treated chrome vanadium steel, each socket surface treated with corrosion resistant black phosphoric acid to prevent oil and rust.Product specification includes 1/2-Inch Drive Ratchet Handle, 3", 5" and 10" drive impact extension bar, 1/2" universal joint, 3/8" (F) to 1/2" (M) Adapter and the following socket sizes: SAE, Deep: 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/16, 1-1/8, 1-1/4". (inches), Shallow: 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/16, 1-1/8, 1-1/4". (inches) ,Metric Sizes: Deep: 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24mm.Laser marking, each with a clear laser size mark, makes it quick and easy to select even in dim light.Customized storage boxes, each with a designated slot, so that the socket does not fall off easily. Sizes are also printed next to each card slot for easy identification.6-point socket design expands the contact surface between the socket and the fastener, increasing the locking force, reduces wear and prevents rounding off at corners