GB 20 x 22 Ring Spanner Single

A ring spanner, also known as a box-end wrench in some regions, is a type of hand tool used for tightening or loosening nuts and bolts. The spanner has a ring-shaped end, typically enclosed with a toothed design to provide a strong grip on the fastener. These rings are often bi-hexagonal (12-point) or hexagonal (6-point), fitting securely around a bolt or nut, which allows for effective torque application without slipping.

Ring spanners are typically made of chrome vanadium steel for durability and corrosion resistance and come in various sizes to match different bolt heads. They may have one ring end or two ring ends of different sizes. They’re widely used in automotive, construction, and mechanical industries for their reliability and precise fit, which minimizes the risk of rounding the fastener edges.