The new Fowler / Bowers MicroGage 2-point Bore Gaging System has been designed specifically for the measurement of small bores between 1.0 - 6.0 mm. The measuring heads are equipped with spherical, split-ball, hard-chromed contact points and are set in appropriate setting rings. The MicroGage system is available as individual instruments or as full sets. All setting rings are supplied with IKAS certification. Features include... 0.060"-0.167" / 1.5-4.25mm Measuring Range Switchable Resolutions... 0.0005", 0.00005" 0.01mm, 0.001mm, 0.0005mm Data Output Includes Setting Ring Includes UKAS Certificate with setting ring