• Determine proper angles for grinding screw cutting tools.
• Can be used with a lathe or bench grinder.
• Improve efficiency and lessen setup time.
• Graduations in 14ths, 20ths, 24ths and 32nds of an inch.
• 60 degree angles for use with U.S. Standard threads.
• Double depth of American National threads.
• Clearance slot in notches.