Pack of 2.
45 degree ruler measurement: 11.5cm and 17cm，30/60 degree ruler measurement: 11.5cm and 18cm.
Great drawing tool for school or office.
With hollow center: the student triangles are easy to grip; The hollow center of 45/ 90 degrees triangle is a protractor and the other is a interesting hollow drawing pattern Wide application: the rulers with right-angle are useful tools for architects, engineers, artists, designers, students, teacher, etc.
BronaGrand Triangle Ruler Square Set 30/ 60 and 45/ 90 Degrees Set of 2 - B0767HXP8K