The MILWAUKEE® SHOCKWAVE Impact Duty™ Impact Sockets feature the boldest, longest-lasting markings and extreme impact durability in high torque applications. The stamped and ink-filled size markings make it easy to select the right socket every time throughout the life of the socket. Engineered with high strength forged steel for optimised performance in heavy-duty applications, and a non-slip hex geometry prevents fastener rounding. The dual-hole design and ring groove allow for easy socket attachment and removal. Key Features Stamped and ink filled diameter markings for wear resistance Dual hole design and groove for easier attachment Non-slip hex geometry to prevent socket and fastener rounding Laser etched part number System of Measurement: Metric Specifications Part Number 49666385 Brand Milwaukee Type Standard