Mitutoyo Holemike Set The performance of the well-established Mitutoyo Holtest series, well-known for their highly stable three-point self-centering action, has been enhanced by coating the contact surfaces with titanium nitride for longer life. Features include... Large LCD readout. Functions available: Presetting, Zero/ABS, power On/Off Data hold, Data out put, Error alarm, Battery replacement alarm. With Ratchet Stop for constant force. Specifications include... 2.0" - 4.0" / 50-100mm Measuring Range 0.00005" / 0.001mm Resolution Set includes... 1 Digimatic Display Unit 4 Measuring Heads 2 Setting Rings 1 5.9" Extension Wooden Case