Drawing set squares made of glass-clear acrylic plastic. Lasting scales and permanent top quality. 1 cm grid, several vertical millimeter scales to the hypotenuse, marked 7° and 42° angles for perspective drawing, marked 75° angles for italic writing, marked 45° angle for easy hatching. Angle numbers on a yellow background.Hypotenuse 25 cm, with facet on all three edges, bosses and removable handle.