This 1/2" x 9/16" Whitworth box spanner is designed for medium to large fixings commonly found in substantial automotive components and industrial pipework. The 150mm (6 inch) length provides extended reach into deeper recesses whilst the bright plated steel construction handles the torque demands of these larger fasteners. The double-ended configuration pairs two sequential Whitworth sizes, streamlining work on assemblies using standardised sizing. This length represents an excellent compromise
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