Clear zinc-plated inch gauges and black oxide metric gauges for easy reading
Convenient wire loop for easy hanging storage
Summarized by Shop
The Original Thread Checker is an accurate and easy-to-use thread verifier for both nuts and bolts. Conveniently assembled onto a wire loop, it is especially well suited for distinguishing between similar inch and metric threads. Made in U.S.A. Specifications
Each size has a nut and bolt checker on the same gauge
Thread sizes are perm
Set Contents
23 inch sizes, 21 metric sizes
Thread Size Markings
Permanently stamped on each gauge
Material
Clear zinc-plated inch gauges, black oxide metric gauges