Heavy Duty Stainless Steel Protractor
This rugged polished steel protractor has a 4 1/2 inch round head and is a full 2mm thick throughout. The large etched scale is easy to read, and has double gradations from 0 to 180 degrees in opposite directions. The length of the arm is 9 inches. Use it to draw parallel lines at any angle or measure any angle such as bevels of any chisel or plane blade.