The gauge set to the British Standard Wire Gauge system (SWG) has two sets of measurements; metric and SWG. The gauge values on this gauge are different to the American gauge, ranging from 1 to 36 as opposed to 0 to 36..
An SWG gauge has a set of metric measurements on the reverse ranging from 0.19mm to 8.23mm.
There are two shapes of British standard wire gauge available; round and rectangular. The only difference between the two is their shape, and to choose between them is purely down to personal preference.
