Professional set of 55 degree Whitworth and 60 degree metric thread pitch gauges This pitch gauge accurately measures internal and external screw threads with 52 folding leaves The leaves are individually stamped with accurately formed thread profiles Measures screw thread pitches between 0.25 - 6.0mm and 4 - 62 BSW(British Standard Whitworth) For use in the automotive and engineering industry when you need an accurate measurement.
