50 mm spanners, also known as 50 mm wrenches, are hand tools used for tightening or loosening fasteners with a hexagonal or square-shaped head measuring 50 mm across. They are designed to handle larger fasteners that require significant torque or force.

50 mm spanners are typically available in two main types: open-end spanners and combination spanners.

Open-end spanners have U-shaped jaws at each end, with one jaw accommodating the 50 mm fastener size. They provide a fixed grip on the fastener and are suitable for quick adjustments in tight spaces.

Combination spanners, also known as box-end spanners, have a closed-loop design with a 6-point or 12-point box-end on one or both ends. The box-end ensures a secure grip on the fastener, reducing the risk of rounding off the corners. Combination spanners often have a different size on each end, providing versatility for working with various fasteners.

50 mm spanners are commonly used in heavy-duty industrial applications, construction projects, and machinery maintenance tasks, where large-sized fasteners are prevalent. They are sturdy, durable, and capable of applying significant torque to handle demanding tasks.