Milwaukee 1/2" Drive 20-mm Standard Socket w/FOUR FLAT™ Sides is designed for versatility and ease of use. This socket features four parallel flat sides that help prevent rolling and provide wrench-ready functionality, making it a reliable tool for various tasks. It is clearly stamped with its size for quick identification, saving you time on the job. The deep socket design incorporates optimized geometry to reduce bolt rounding and stripping, ensuring a secure fit and longer tool life. This combination of features makes it an essential addition to any toolbox. Model Number: 45-34-9121