2 in 1 protractor ruler By combining the ruler and the protractor, the length (0-25cm) can be determined with a fixed ruler, and the length (0-30cm) by moving the ruler can be measured . Quality material.The angle measuring ruler is made of high quality stainless steel for longer durability, abrasion resistance. The surface of the product is smooth, scratch-resistant, wear-resistant, can be used for a long time. Easy to use. The metal protractor can rotate the protractor 180 degrees by adjusting the nut and can lock the ruler at a fixed angle at the desired position to measure the angle quickly and easily. Precision in use. The protractor ruler uses a metric scale and can be used to measure angle and length. Graduations on base and ruler are precision laser etched then black filled for long life and easy readability. Widely Used.Perfect for students, machinists, DIY jobs, carpenters and woodworking enthusiasts, vehicle maintenance and repair, construction, drafting to draw radial lines, setting bevels and transferring angles.