Bowers' XT3 digital internal micrometers offer a new ergonomic design - including a larger and clearer LCD display - along with IP67 electronics protection, proximity output with optional built-in Bluetooth; both allow bi-directional communication giving greater flexibility for data acquisition and storage. The extended mechanical travel of the XT range means that special heads can also be manufactured to accommodate users most awkward measuring problems. Measuring heads for threads, splines, slots, grooves, deep-holes and many more applications are available. Simple 2-button operation 4 preset memories Setting rings included with individual instruments and set Tungsten carbide measuring faces on all 3-point heads from 12.5m Blind bore measurement from 2mm - 6mm and above 12.5mm (0.500")