This stainless-steel protractor has micro-fine marking lines every half degree. There are four angle scales: zero left to 180° right, zero right to 180° left, zero top to 90° left and right, and 90° top to zero left and right.
With the use of the metal T-bar, you can hold your workpiece perfectly square to an edge. The T-bar is removable to work on flat surfaces or to use the 6" centering scale with marking holes every 1/32".
A 0.5mm mechanical pencil is included, but regular wooden pencils and metal scribes can also be used. Non-glare finish.
Made in USA.