- Very Handy Gauge used in grinding and setting screw cutting tools.
- Made of tempered stainless steel.
- Clearly etched Scale for finding number of threads per Inch through graduations in 14ths, 20ths, 24ths and 32ths of an inch.
- Gauge also features a table of double depth of thread for determining size of tap drills.
|American Unified National Standard 60°|
|Whitworth or English Standard 55°|