HIGH QUALITY - This triangular ruler is made of fine aluminum alloy material, high hardness, durable in use GIFT FOR - Essential tool for home builders, DIYers, carpenters, artists and hobbyists! FUNCTION - The right angle ruler is suitable as an auxiliary tool in woodworking. It can be used to measure your drill bit height, table saw height, etc. LARGE MEASUREMENT RANGE - The right angle ruler can measure 90 degrees / 45 degrees. EASY TO READ - With clear and accurate scale, easy operation provides better working performance. Specifications: Measuring range: 90/45 degrees Material: aluminum alloy Package List: 1 * Right Angle Ruler On the one hand you can use the measuring scale to measure the height of the router in the router table / the height of the saw blade of a TK - if you don't have a device extra with a converted caliper. In addition, you can use the correct angle when building drawers, for example, and use the holes in the middle as a template for the curves