Our ShockWave Impact Duty socket set features the boldest, longest lasting markings and extreme impact durability in high torque applications. The stamped and ink filled size marking enables our users to select the right socket every time. Engineered with high strength forged steel for optimized performance. The non-slip hex geometry prevents fastener rounding. Our dual hole design and ring groove allow for easy socket attachment and removal. Our customizable socket rail comes with removeable end caps to add or take off socket clips for optimal storage. This set is optimized to get every job done. All ShockWave Impact Duty sockets are backed by our lifetime guarantee and meet ASME industry standards.