[270-degree scientific ergonomic design] It can easily transmit the size of stair tread and riser, and it can be perfectly fitted consistently. You can extend this stair tread template tool from 30.5 inches to 49 inches. No tape measure is required. This stair tool will provide you with an angle from 0 degree to 270 degree, and the length can be adjusted to cut the stair treads. No need to . You will love it because it can make measuring steps so simple. [Born for easier work] Stair tread template tools will help you to lay stair treads, stands and shelves to perfection. Before completing set of stairs, accuracy and time savings will be paid for the template. Easy to operate and adjust to the correct angle. Portable and simple. This stair tread template tool will shorten installation time. [Easy to install and disassemble]: 1. Assuming that all your steps are uneven. Make sure your steps are level in all directions. 2. Make sure to measure your overall riser height. 3. Use long straight edges to that the edges of the steps are aligned. 4. Use this stair tread clamp to mark the front of the 1X2 board you are using. Follow the steps and your cut will be perfectly presented. [High quality, reusable] This stair tool is made of impact- and chemical- wood material, which is very and reusable. It is very easy to adjust the angle and length to meet any work requirements. Use the 4 knobs to lock firmly in place. It will not scratch the material during use. Simple and easy to use, it is essential for precise cutting and measurement. colour:Wood color Material:wood Package Contents: 1 x Stair Tread Template Tool Set Only the above package content, other products are not included. Note: Light 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.