1、ALUMINUM MATERIAL: The scale plates of the stair tread template tool are made of premium aluminum which is long lasting, erosion resistant, and rustproof. Tie rods are made of aluminum alloy and the surface is treated by anodizing to prevent discoloration in humid or high temperature environments 2、EASY INSTALLATION: The stair tread gauge is easy to installand remove, no need to use other tools. The stair gauge length of trapezoidal measuring tool can be easily adjusted with four knobs and securely locked in place. Insert the tool between two walls, pull tight and tighten the screws to measure the length and side angle, then you can use to measure stairs or risers 3、FLEXIBLE ANGLE: Stair gauge can be easily adjusted in angle, length and height to meet any job requirement. Adjustable range is 11in‑60in. A scale is added to the treads to measure the stair treads more accurately. The scale plates of the stair jig can be rotated 360° to measure the rotation angle of the stairs, you can easily adjust the scale plates to fit any corner of the stairs, and you can also do your woodworking according to your drawing 4、WIDE APPLICATION: The stair tread template tool can measure the length and angle of stairs. The stair gauge can meet all your needs when installing stairs. Stair tread template tool is suitable for complex stairs or corners, and can also be used to measure furniture such as bookcases, cabinets, flower pots, bathtubs, etc. One product has multiple uses to meet your home needs and reduce the difficulty of measurement work 5、SCOPE OF APPLICATION: Stair treads measuring tools can be used to cut and measure stair treads, stair risers, shelf, windowsills, closet shelves and some angle layouts