Nut and Bolt Thread Checker Standard and Metric, 44 Male/Female Bolt Size Finder Thread Gauge (23 Standard & 21 Metric), for Bolt and Nut Size Chart in Narrow Areas

Is as stated. Works on threads inside and out. I use for basic thread checking. I use wire and micrometer for precision thread checking.

Great design and quality

This is a great design and the quality is great. Is a real time saver.

They need to be made of steel, they are too soft

They need to be made