Product description Measuring range 0 to 6.25 inches Accurate to .001 inch per 6 inches Large LCD display Resolution to 0.0005 inches Solid and substantial cast base (2 inches x 1.25 inches x 4 inches) with lapped bottom Hardened stainless steel vertical beam Hardened steel scribe .25 inches wide with 2 inch reach Readout the quickly converts between inches (.001”) , and metric (.01 mm) Zero function at any depth Power saving that shuts off after 5 minutes Battery: 3 volt CR2032 with approximate life of 1 year