The SHOCKWAVE Impact Duty 3/8 Socket Set features the boldest, longest-lasting markings and extreme impact durability in high torque applications. The stamped and ink-filled size marking enables you 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 MILWAUKEE SHOCKWAVE Impact Duty Sockets are backed by our Lifetime Guarantee and meet ASME industry standard. Includes 1/2 In. (inch) and 9/16 In. Shockwave impact sockets and 3/8 In. socket adapter.