Starrett 277 Series Toolmakers' Spring-Type 3" (75mm) Dividers with Round Legs and Solid Nut are the finest tools of their type. Designed for toolmakers and metalsmiths who require finer adjustment and better balance so that a more sensitive "feel" can be obtained. Bearing surfaces of the legs are large enough to prevent any side deflection. Precision made to rigid Starrett standards throughout. Features include hardened fulcrum stud, strong and flexible bow string, and centrally located leg adjustment to assure smooth action. Made in USA by Starrett.