1. Material: The stair tool is made of steel and anodized aluminum alloy to prevent discoloration in humid or temperature conditions. The screws are resistant to breaking, reusable, and easy to carry. 2. Easy to Use: The length is easily adjustable with 4 buttons and locks securely in place. Insert the tool between two walls, tighten the screws firmly, and adjust to measure length and side angles, allowing you to measure stairs or elevations. It is simple to operate and can be used to mark cutting lines, making it for a variety of projects. 3. Precise Scale: The stair template simplifies operation and adjustment to the correct length and angle, delivering simple and precise results without the need for a tape measure, saving significant work time. 4. Quality Material: Our stair template is made of aluminum alloy, sturdy and impact resistant. Anodized for hardness, durability, and reusability.