1、Made of aluminum alloy material, wear‑resistant and anti‑corrosion, not easy to deform after long‑term use. 2、The folding triangle has a wide range of functions, which can draw 90° angles, balance lines, vertical lines and draw equidistant center points. 3、The adjustable positioning knob corresponds to all the intersections of the drawn line and the edge are equidistant. 4、Adjustable positioning nut helps you freely choose the angle to achieve precise positioning. 5、Used for drawing slopes, beveling the ends of roof trusses, and opening the beak, is a practical tool for woodworking scribing layout. Item Type: Folding Triangle Square Material: Aluminum alloy Ruler Base Thickness: Approx. 25mm / 1in Ruler Thickness: Approx. 8mm / 0.3in Folding Size: Approx. 165 x 183mm / 6.5 x 7.2in Expanded Size: Approx. 310 x 183mm / 12.2 x 7.2in 1 x Pencil 1 x Foldable Square Ruler 1 x Eraser