Steel Center Gage, 55 Deg Range, Whitworth or English Standard
Extremely handy for use in grinding and setting screw cutting tools.
Ground gaging surfaces
Made of spring-tempered steel with satin chrome finish.
Very useful for finding number of threads per inch through graduations in 14ths, 20ths, 24ths and 32nds of an inch.
Whitworth or English 55 Deg standards