Milwaukee 3/8" Drive 21mm Socket

ANTI-ROLL VERSATILITY & PRECISION TORQUE

In the world of high-volume mechanical maintenance and fleet service, efficiency is dictated by tool reliability and workspace organization. The Milwaukee 45-34-8021 3/8" Drive 21MM Metric Socket eliminates the common frustrations of the shop floor with its revolutionary FOUR FLAT™ side design. By engineering a socket that refuses to roll away on uneven surfaces and provides a secondary wrench-compatible interface, Milwaukee has maximized the ROI for professionals who cannot afford to waste time searching for runaway tools or struggling with rounded fasteners in high-torque applications.

• / FOUR FLAT™ SIDES: Squared-off geometry prevents the socket from rolling off the bench and allows for external wrench assistance in confined spaces.
• / STAMPED SIZE IDENTIFICATION: High-visibility metric markings are stamped into the flats for permanent, easy-to-read recognition that won't wear off under heavy use.
• / ANTI-ROUNDING 6-POINT GEOMETRY: Optimized internal hex engagement reduces the risk of stripping or rounding high-tolerance metric bolts.
• / PROFESSIONAL GRADE CHROME: Chrome-plated finish provides superior corrosion resistance and a smooth surface for easy cleaning after greasy service calls.

WHAT'S IN THE BOX

(1) 3/8" Drive 21MM Metric 6-Point Standard Socket (45-34-8021)