Screw pitch gauge Whitworth 55° with 28 blades (4-62)

Whitworth thread 55 degrees Thread counter with g28 blades for external and internal measurements.

Set combination: 4-4,5-5-6-7-8-9-10-11-12-13-14-16-18-19-20-22 -24-25-26-28-30-32-36-40-48-60-62