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Ring Spanners

A ring spanner is a hand tool that is designed to fit all the way around the fastener, to provide enhanced grip when tightening or loosening it. 

Ring spanners are manufactured in two different profiles - 6-point (hex) or 12-point ('bi-hex' or 'double hex'). A hex ring spanner grips all the edges of the bolt, enabling the operator to apply more torque, whereas a bi-hex ring spanner grips each of the corners of the bolt, making it slightly better for use in confined spaces.

Ring spanners are used by DIYers for fastening jobs around the home, by mechanics when a strong grip is required to turn nuts and bolts on car engines and suspension, as well as by maintenance technicians who work on machinery on production lines. 

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