Made from high-quality aluminum alloy material, it is light and convenient, durable to use, good oxidation resistance, rust proof. Humanity design, beautiful appearance, each corner of the ruler has been specially and will not hurt your hand. Permanent graduations with clear and easy-to-read numbers. Designed with hole for easy carry and storage. Easy to work, saves time and effort, easy to operate and hold. perfect for all and remodeling projects, hobbyists, home builders, manufacturers, artists and more. Can be used to make precise right-angles and as a cutting & drawing guide. 7-inch Multiple graduation rafter square has many kinds of Application, suitable for marking square and 45-Degree Lines, protractor, framing square, triangle square, marking horizontal base, and can also be used as a scriber and saw blade guide . The lip can be used for safe positioning. With 0-90 protractor scale. Colour:red Material:Aluminum alloy Size:about 198 x 278mm Package Contents: 1 x Detachable Triangular Ruler 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.