WEICHUAN Math Geometry Tool Set - 8 Pieces - Rulers, Protractor, Compass, eraser and Pencil Great math tool set for school - plastic storage case for on the go convenience Set includes; 15cm transparent ruler, 45/90 triangle ruler, 30/60/90 triangle ruler, 180 protractor, One mechanical pencil compass, .5 #2 HB mechanical pencil, .5 #2 graphite refill, and a white eraser. Plastic durable case to protect and keep tools in one place in a backpack or desk Case dimensions; 7" x 2.8" x 1"