Thread Gauge - Small Inch & Metric Sizes - Nuts, Bolts & Screws Measuring & Identification Tool
Inch and Metric Sizing - Small Sizes
Used to gauge Inch fastener sizes from #1-64 through #5-40
Used to gauge Metric sizes M1.2x0.25 through M3.5x0.35
Offers knobs and slots with permanent, easy to read size markings that won't peel off
Solid steel thread checker on wire lanyard