Milwaukee 16-piece shockwave impact duty 3/8in. Drive metric/sae deep 6 point socket set features boldest, longest-lasting markings and extreme impact durability in high torque applications. Stamped and ink-filled size marking enables users to select right socket every time throughout life of socket. SeMilwaukee sockets are engineered with high strength forged steel for optimized performance in heavy-duty applications. Non-slip hex geometry prevents fastener rounding, and a dual-hole design and ring groove allow for easy socket attachment and removal. Storage cases are impact resistant and nest toger for easy stacking and storage. All shockwave impact duty sockets backed by a lifetime guarantee and meet asme industry standards.