[ALUMINUM MATERIAL]: The scale plates of the stair tread template tool are made of premium materials which is durable, anti-corrosion, and anti-rust. Tie rods are made of aluminum alloy and the surface is treated by to prevent discoloration in humid or high-temperature environments. [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. [EASY INSTALLATION]: The stair tread gauge is easy to install and easy to remove, no need to use other tools. The Stair gauge length of our trapezoidal measuring tool can be easily adjusted with four knobs and securely locked in place. Insert the tool between two walls, pull it tight and tighten the screws to measure the length and side angle, then you can use it to measure stairs or risers. [FLEXIBLE ANGELE]: Stair gauge can be easily adjusted in angle, length and height to meet any job requirement. Adjustable range is 11inch-60inch. A new scale is added to the treads to measure the stair treads more accurately.The scale plates of the stair 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. Material: Aluminum alloy colour: black Package Contents: 1 set x stair tread template tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.