Linex conveyor with grip

The protractor is a ruler that is shaped like half a square with one angle at 90° and two at 45°. On the protractor you have two different degree scales; one 0-180° and one 181-360°. Depending on which course you are going to take, you use either one or the other scale. Made of crystal clear dunilon.
Length 280 mm.
Width 200 mm.
Thickness 2.7 mm.