Front metric scale: 5-6-8-10-12mm, scale on the back: 3/16-1/4-5/16-3/8-1/2 inch; Height Gauge: 5-6-7-8-9-10-11-12-13-14-16 (metric scale), 1/8- 3/16-1/4- 5/16- 3/8 7/16-1/2-9/16- 5/8 scale 2 in 1 design that allows you to set -up the table and set the Router- depth, using the same tool Lets- you make repeatable, strong, precise dovetail joints correctly with ease. By controlling the positioning of the teeth and the milling cutter, it is easy to accurately control the size of the bumps Features prefabricated male and female guide rails, conform to standard sizes used in furniture manufacturing. Ideal- for setting up height on table and Router- bits- depth Aluminum-alloy after machining, the caliper can provide fine scale, with engraved- marking for, Manufacturer: TSMORY