• Used to check thread angle and pitch of thread cutting tools. / Use to grind and position thread cutting tool on a lathe
• 55 degree angle, tempered with a satin-chrome finish Extremely handy for use in grinding and setting screw cutting tools / Hardened with lapped edges and notches
• Very useful for finding number of threads per inch through graduations in 1/14" and 1/20" of an inch on center gauge
• Ground gauging surfaces. Center gauge with inch graduations