Starrett 178B Inch Reading Fillet Or Radius Gauge With Locking Device, 17/64-1/2" Range, 1/64" Increment, 32 Leaves

This gauge is very useful for tool and die makers, machinists, screw machine operators, patternmakers and other mechanics to lay out and check radii of tools, dies, patterns, etc. The gauge has leaves for measuring both concave and convex radii, with each leaf stamped with the radius size. Any one of the leaves can be securely locked in position by a locking device.