[Two-in-one design]: use a ruler and a protractor in combination. It can be used to set the bevel angle and measure and mark the angle. You can disassemble and use it according to your actual needs. [Precision scale]: stainless steel protractor and ruler use metric scale, the surface is precision laser etched, markings and numbers are clear and easy to read (metric scale), not easy to wear or fade. [Material]: Woodworking protractor and ruler are made of high-quality stainless steel, which has high hardness and good rust resistance, and is durable. Protractor marking range: 0-180 degrees, ruler marking range: 0-10cm/0-8cm. [Adjustable nut design]: The adjustable nut design allows the protractor measuring instrument to rotate the ruler at a fixed angle and lock it at the desired position, so that it can quickly and easily recognize the angle and make the marking measurement. [Multiple applications]: The 180-degree angle protractor is an ideal choice for students, designers, architects and carpenters to measure and mark. It can be applied to DIY work, engineering, student drawing, architectural design, woodworking, etc. Specification: Product name: 0-180 protractor goniometer Material: Stainless steel Color: silver Size: 21.5CM Size: Protractor marking range: 0-180 Straightedge marking range: 0-10cm / 0-8cm Description: 1. The stainless steel goniometer is very suitable for setting chamfers, drawing radial lines, measuring and marking angles. 2. The two-in-one design of the round head protractor ruler can help you save more working time and improve work efficiency. 3. Protractor Goniometer is an important basic tool in many fields. Commonly used in machinery, architectural design, schools, machinery and maintenance engineering, etc. 4. It is easy to carry and easy to operate. It is an ideal choice for students, mechanics and carpenters to measure and mark. Package: 1 x Stainless steel protractor (marking range of ruler: 0-8cm) 1 x Stainless steel protractor (marking range of ruler: 0-10cm)