The MILWAUKEE 3/8'' Drive 21MM Metric 6-Point Deep Well Socket with FOUR FLAT Sides was designed from the ground up to be part of the most versatile socket family. The 3/8'' drive sockets feature an innovative design with four parallel flat sides, which deter rolling and are wrench-compatible. The metric socket sizes are stamped into the flats providing improved, easy-to-read visibility. This deep well socket has been optimized geometry to reduce bolt rounding and stripping. Milwaukee backs their 3/8'' Drive Metric Sockets with a lifetime guarantee. FOUR FLAT Sides deter rolling Wrench-ready FOUR FLAT sides Stamped Sizes for Better Visibility Chrome Finish Optimized Geometry to prevent rounding 6 Point Socket
