DESIGN: stair tread template tool has been patented. It is designed with sliding rods with a male and female fit slot, making the measurement more accurate, stable and easier to use. Accurate and clear ruler markings allow the stair tread installer to accurately measure the length and angle of treads and risers. Dual-use design of the sliding rod and wooden bar. COMPLETE ACCESSORIES: Each stair tread measuring tools consists of (2 x tread templates, 2 x 16-inch sliders, 2 x 12-inch sliders, 2 x 8-inch sliders, 2 x wooden strip fixing blocks, 9 x knobs, 5 x long screws, 9 x short screws, 1 x washer, 1 x 6-angle screw wrench.) which can be used in combination to form one piece of tread template according to the actual stair length and at any angle. This is an essential tool for precision cutting and professional measurements. RELIABLE AND DURABLE: The stair gauge is made of aluminum-alloy material, making it resistant to damage and bends. The CNC anodized surface is wear-resistant and rust-proof, and the electroplating markings are more precise and clearer. With superior quality, reliability and durability, this stair measuring tool will help you lay out stair treads, risers and shelves. adjust the angle and length to meet any work requirements. EASY TO USE: Use knobs to properly lock tread templates and sliding robs in place. Turn the knobs to loosen or tighten. Loosen the knob and slide the rod to adjust the length. Turn the stair tread jig to adjust the angle, tighten the knob to fix the length and angle, and move it to the stair tread wood or risers to be cut as needed. Portable, easy to operate and the measurements are extraordinarily accurate. Colour:orange Material:aluminum alloy Package Contents: 1 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.