Lets you make repeatable, strong, 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 2 in 1 design that allows you to set up the table and set the Router depth, using the same tool 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 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 Aluminum-alloy, after machining, the caliper can provide fine scale, with engraved marking for, Manufacturer: yanwuwa