Fowler / Bowers XT Holematic Pistol Grip Fowler / Bowers' XT3 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... .312"-.375" (8-10mm) Measuring Range 0.00005" / 0.001mm Resolution 2.28" (58mm) Measuring Depth Tungsten Carbide Measuring Faces Self centering head Large easy-to-read display. Bluetooth data connectivity