The Milwaukee Shockwave Impact duty is 3/8 in. drive metric deep 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 you 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.