Set, Combination, Starrett, 12 inch, with CAST IRON 90/45 Deg. SQUARE, CENTRE & PROTRACTOR Heads, BLACK WRINKLE Finish, SATIN CHROME INCH blade, 4R Graduations, #C435-12-4R
Multi-function Trammel used for scribing arcs and circles and gauging with pencil, scribing pin or blade.
Attaches to steel rules and the blades of squares