This triangle set combines two of the most popular sizes in a convenient pack that is ideal for students and drafting beginners. These high quality aluminum tools will not break in work bags or back packs and the photo-anodized imprint method means that the calibrations will never fade or rub off. Calibrations are in inches and centimeters. Set includes one 6" 45/90 angle triangle and one 8" 30/60 angle triangle.