Milwaukee 1/2" Drive 18-mm Standard Socket w/FOUR FLAT™ Sides is designed for versatility. It features four parallel flat sides that help prevent rolling and provide wrench-ready capabilities, making your work more efficient. The socket is clearly stamped with its size for quick and easy identification. This deep socket also boasts optimized geometry that reduces the risk of bolt rounding and stripping, ensuring a reliable grip every time. Model Number: 45-34-9119