Pocket size, folding thread gage covering both Whitworth 55° ( BSW, G- Parallel) threads, (Metrisch) Metric 60° threads and American TPI
58 labled fold out Blades.
28 Whitworth G covering 4G through 62G
24 ISO Metric M0.25 through M28
6 American (TPI)
8, 10, 11, 14, 19, 28
L: 2-9/16" T: 1/2" W: 3/4" WT: .2