Optimized for use with 1/2" drive impact wrenches, drivers, ratchets, and adapters Stamped and ink filled diameter markings for wear resistance 6-Point design made with forged impact steel for durability in high torque applications backed by our Lifetime Guarantee Kit includes 19 Deep SAE Sockets. The following sizes are included: 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, 1-3/16, 1-1/4, 1-5/16, 1-3/8, 1-7/16, 1-1/2 Dual hole design and groove for easier attachment Non-slip hex geometry to prevent socket and fastener rounding Lifetime Guarantee covers impact sockets and extensions only Laser etched part number Meets ASME Industry Standards