YAJU Metric Imperial ScaleThe caliper has metric and imperial scale, accurate reading, and can meet different needs. Precise marking rules help you draw perfect horizontal lines while sliding rules along the working edge. Wide ApplicationThe tenon card gauge fits for measuring many irregular items, winding pipes, auto metal sheet, circular frames, pipes, tile, laminate, wood planking, ducts, flooring, carpet, molding, etc. Package ContentThe tenon card gauge is designed with premade convex and concave guides to fit standard measurements in furniture making. It is small in size, about 95x59x8mm, and you can take it everywhere. Premium Materialcard gauge is made of high-quality aluminum alloy, which is tough and durable, lightweight, sturdy, and well built. The tenon card gauge allows you to easily cut correctly and repeatedly. Easy To UseThe width of each tooth bumps is the same, so by controlling the positioning of the teeth and the milling head, it is easy to measure the size of the bumps.