Features:
- Made of hardened spring tempered steel with a satin chrome finish
- Graduated in 14ths, 20ths, 24ths and 32nds for the accurate measurement of threads per inch
- Indicates double depths for use when determining the size of a tap drill
- 60° angles for U.S. standard threads and double depth of American National thread
- Notches have clearance slots
Application:
- A useful guide for grinding and setting thread cutting tools with a grinder or lathe
