Master Hex Bit Socket Set Allen Wrench Bit Kit Hex Key for Ratchet Socket Tool SAE and Metric Set 3/8, 1/4, 1/2 Drive Socket Set 34-Piece Hex bits made of premium S2 alloy steel ,superior hardness that reduces wear outs and ensures maximum durability. High strength chrome vanadium steel sockets provide superior torque for greater turning power paired with a mirror chrome finish that provides resistance against rust, grime, and corrosion. Hex bit tips are precisely machined to ensure accurate sizing with beveled, chamfered ends for easy and smooth insertion that protects both bits and fasteners from damaged edges. Abundant variety of sizes in this set make repairs easy on car, bike or motorcycle, perform industrial work for machinery, remove a vehicles’ axle bolt, fix brakes, or even tune up wheelchairs. Set include: 17 x SAE bits - 1/4" Drive (1/16,5/64, 3/32, 1/8, 5/32, 3/16, 7/32, 1/4”); 3/8" Drive (9/32, 5/16, 3/8, 7/16, 1/2”); 1/2" Drive (9/16, 5/8, 11/16, 3/4”) and 17 x metric bits - 1/4" Drive (1.5, 2, 2.5, 3, 4, 5, 5.5, 6 mm); 3/8" Drive (7, 8, 9, 10, 12 mm); 1/2" Drive (14, 15, 17, 19 mm).