Contour gauge on a threaded rod beside a yellow tape measure on…

A metal comb-style contour or profile gauge (marked 'GENERAL NO. 837 MADE IN U.S.A.') pressed against a threaded rod or drill bit to capture its profile, with a yellow Stanley 25ft tape measure laid below showing about 2 to 8 inches on a wood-grain surface.

AI caption July 2004 · Photo 196 of 446