Features: Easier to identify the precise angle. Stainless steel for precision-, strength and rust resistance. Deeply etched graduations read from 0° to 180° in forward and reverse directions and will not wear or rub off. Adjustable protractor arm locks into desired position with knurled thumb nut to quickly and easily identify angles. Perfect for students, machinists, carpenters and woodworking hobbyists for setting bevels-, measuring and transferring angles. Specifications: Material: stainless steel Measuring Range: 0-150mm/0-180° Accuracy: ±1° Package Includes: 1xAngle Finder note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.