Our Shockwave Impact Duty is 3/8 in. 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， 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 standards.