Milwaukee 45-34-9031 1/4” Drive 5.5mm Metric 6-Point Socket Our Milwaukee 45-34-9031 1/4” Drive 5.5mm Metric 6-Point Socket with FOUR FLAT™ Sides was designed from the ground up to be part of the most versatile socket family. Milwaukee® sockets feature an innovative design with four parallel flat sides, which deter rolling and are wrench-compatible.

The socket sizes are stamped into the flats providing you with improved, easy-to-read visibility. These deep and standard socket sizes have optimized geometry to reduce bolt rounding and stripping. We back the Milwaukee 45-34-9031 1/4” Drive 5.5mm Metric 6-Point Socket with FOUR FLAT™ Sides with a lifetime guarantee.