Drive Metric Standard 6 Point Socket Set features the boldest, longest-lasting markings and extreme impact durability in high torque applications. The stamped and ink-filled size marking enables users to select the right socket every time throughout the life of the socket. These Milwaukee sockets are engineered with high strength forged steel for optimized performance in heavy-duty applications. The non-slip hex geometry prevents fastener rounding, and a dual-hole design and ring groove allow for easy socket attachment and removal. The storage cases are impact resistant and nest together for easy stacking and storage. All SHOCKWAVE Impact Duty Sockets backed by a Lifetime Guarantee and meet ASME industry standards.