These are high quality Gear Wrenches & Bit SAE Set. The set contains 4 gear wrench: 3/8", 7/16", 1/2", 9/16". Three phillips: #1, #2, #3. Three slotted: 3/16", 1/4", 9/16". Two square: S1, S2. Two torx: T15, T20. One bit holder. 3/8" aluminum bit adapter. 1/4" Cr-V socket adapter. Body of chrome vanadium, hot drop forged with special heat treated, long lifetime assurance. The thin head allows the gear wrench into tightest area. Features 72 tooth ratcheting box-end and 5 degree of sweep to move faster. Torque exceeds or meets ANSI, DIN, and FEDERAL. Excellent set a home garage worker or auto mechanic must got in their toolbox.