Manufactured from stainless steel, these small flat gauges have angles of 55° and 60°
very useful for grinding and setting thread cutting tools, these may also be used for checking the pitch of threads through the permanently deep etched graduations in 14ths, 20ths, 24ths and 32nds of an inch
These gauges meet the American National or US 60°, Whitworth or English 55° specifications