Accurate and time saving: The stair tread template enables the treadle installer to operate and adjust to the correct length and angle accurately, delivering the required tread results without a tape measure and saving most of the working time. Flexible adjustable: The stair gauge helps you measure stair treads, risers and shelves. Easily adjust the angle, length and height to meet any work requirements; suitable for stairs, risers and shelves. Easy to use: The length of the tool can be easily adjusted with four knobs and locked firmly in place. Insert the stair wizard between two walls, stretch and tighten the screws safely to measure the length and side angles, and then use it to track steps or risers. Material: Stair tools are made of stainless steel and aluminum alloy; the surface is anodized to prevent discoloration in humid or temperature environments. Reusable and portable: The bolts are not easy to break; reusable and easy to carry. Use scenarios: Scenario 1: Remodeling a staircase where you need to measure and cut treads and risers to exact length and angle. Scenario 2: Installing built in shelves or cabinets that must align with stair geometry. Scenario 3: DIY stair projects or custom stair parts that require precise length and angle measurements.