Westward 5MR01 Box End Wrench 12 x 14mm

Metric Double Box End Wrench

The Westward 5MR01 is a metric double box end wrench sized for 12 mm and 14 mm fasteners. Its 40-degree offset heads provide clearance around obstructions while keeping knuckles clear of hot or sharp surfaces. The tether-capable design allows attachment to a lanyard for working at height or in confined spaces. Alloy steel construction with a satin finish resists corrosion and rounding.

Capacity and Headroom

The 12 mm and 14 mm openings cover common automotive, machinery and plumbing fasteners in a single tool. The 8 3/4 inch overall length delivers usable leverage for typical torque requirements without excessive bulk. The 40-degree offset works well in engine bays and equipment frames where straight access is blocked. Very high-torque or seized fasteners may exceed the practical leverage of this length.

Upgrade From Adjustable Wrenches

This fixed-size wrench replaces adjustable wrenches when precise fit and reduced rounding risk are priorities. The box end grips all six flats of the fastener, distributing force evenly across the corners. The jump is worth it for technicians who repeatedly service 12 mm and 14 mm hardware and want faster engagement than a movable jaw allows. Buyers needing a broader range of sizes in one tool will not find that here.