Features: Multifunctional folding ruler: This folding ruler can easily measure the size of stairs as it can easily adjust the angle, length and height to meet any work requirement. Measuring range: 11 inches to 60 inches, no tape measure required, saving most of the working for time. High accuracy: Our stair measuring tool allows the installer of the treads to easily operate and adjust to the correct length and angle, easily and accurately get the treadmill size they need. Easy to use: The length of our stair measuring tool can be easily adjusted with four knobs and locked firmly in place. Insert the tool between two walls, stretch and tighten the screws firmly, measure the length and corners, and you can use it to measure stairs or elevators. Wide use: Our stair tread template tool is suitable for cutting and measuring stair treads, stair treads, elevator treads, shelves, window sills, cabinet shelves and some angle designs. Specification: Material: Aluminum Alloy Measuring range: 11-60 inches (11.4-60.7 inches allowed) Product size: Refer to the size chart Optional colors: Blue/Red/Black Quantity: 1Set Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1xStair Tread Gauge (other accessories demo in the picture is not included.)