Fowler-Bowers Internal 3-Point Bore Gauge is a precision instrument designed to measure internal diameters in the 2 to 3 inch bore range. It uses inserts sized for 2.5 to 3 inches and provides an accuracy of 0.00025 in. This gauge is intended for verifying bore diameters in machined parts where tight internal tolerances are required, such as cylinders and bushings.
