Find it at Testequipmentusa Wide measurement range without changing anvils IP65 level of protection against coolant, water, dirt and dust Resolution to .00005" (0.001mm) Large high-contrast LCD digital readout is easy to read and reduces error RS232 output Carbide measuring faces on sizes above 1/2" (12.5mm) diameter Extensions available for deep holes Includes instant inch/millimeter conversion and preset + and - functions Precision ratchet stop provides correct contact pressure for accurate readings Each micrometer bore gage with head comes with a wooden case, complete with setting ring, contacts, adjusting wrench, spare battery, and instructions. Proximity output with optional built-in Bluetooth Bi-directional communication SPECIFICATIONS Range (in): 3/8 - 3/4" Range (mm): 10-20mm Resolution (in): .00005" Resolution (mm): 0.001mm SPC Output: SPC Output