Features and Benefits:Optimized for use with 3/8" 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 2 Deep Sockets and 1 Socket Adapter. The following sizes are included: 9/16, 1/2, 3/8" Socket Adapter;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;The MILWAUKEE? 3-Piece SHOCKWAVE Impact Duty? 3/8" Drive Deep Well Socket Set features the boldest, longest-lasting markings and extreme impact durability in high torque applications. The stamped and ink-filled size markings make it easy to select the right socket every time throughout the life of the socket. Engineered with high strength forged steel for optimized performance in heavy-duty applications, and a non-slip hex geometry prevents fastener rounding. The dual-hole design and ring groove allow for easy socket attachment and removal. All SHOCKWAVE Impact Duty? Sockets are backed by a Lifetime Guarantee and meet ASME industry standards.