CMT DHG-001 Digital Height Gauge 0 to 3-Inch measuring range, additional 0 to 2-Inch by using the needle included 0. 004 accuracy, 0. 002 resolution, CR2032 3V battery (1500 hours) Horizontal and vertical measuring, Self-standing for setting cutting depth on router tables and low profiles for backfence adjustment Measuring ruler with metric/imperial scale and locking screw