Milwaukee Sockets were designed from the ground up to be part of the most versatile socket family in the industry. The innovative socket design has four parallel flat sides which deter rolling and are wrench-compatible. Socket sizes are stamped into the flats for improved easy-to-read visibility. Optimized socket geometry helps reduce bolt rounding and stripping.FOUR FLAT Sides deter rollingWrench-ready FOUR FLAT sidesStamped Sizes for Better VisibilityChrome FinishOptimized Geometry to prevent rounding6 Point SocketLifetime GuarenteeDeep Socket