Fowler/Bowers XT Holematic Pistol Grip range of bore gages offer extended travel with fixed anvils. The pistol grip handle incorporates a constant measuring pressure to eliminate operator "feel". Includes Bluetooth Connectivity. Package includes the following... Measuring Head Pistol Grip / Display Setting Ring Features include... 9.00"-10.00" (225-250mm) Measuring Range 0.00005" / 0.001mm Resolution 4.05" (103mm) Measuring Depth Tungsten Carbide Measuring Faces Self centering head Large easy-to-read display. Includes Bluetooth Connectivity