Isomars Set Squares - Technical Drafting Rulers are combination of 10" and 12" professional triangles made of clear plastic.
Set Squares are used in conjunction with straightedge of drawing board to draw accurate angles. 25cm/10"- 45 degrees 30cm/12"-60 degrees Thickness - 2.9 mm.
This durable T-square scale with detachable head for students and professionals has been designed with precision to yield the most accurate measurements and drawings.