Invaluable for determining the number of threads per inch through graduations in 14ths, 20ths, 24ths and 32nds. Made of spring-tempered steel with a satin chrome finish.
Scale for Determining Threads per Inch graduated in 14ths, 20ths, 24ths and 32nds of an Inch
Material: Spring-Tempered Steel
Finish: Satin Chrome Finish
Whitworth or English 55 Degree Standards