These micrometers offer many advantages including: 50 millionths readout, push button control, rugged construction, and 2 years use on a single battery. The on/zero button turns the micrometer on and allows the user to establish a zero point anywhere along the measuring range of the unit. Feature carbide measuring faces and a precise vernier scale on the thimble. LCD is selectable between inches and mm. Thimble is graduated in inches. Measuring Range: 0-1"/0-25.4mm