【Clear Scale】: Math geometry ruler has a clear scale, easy to measure and read, suitable for chalkboards, whiteboards, erase boards, and more 【Material】: Drawing math geometry tool is made of premium PP material with high flexibility, sturdy and wear resistant, not easy to deform, smooth surface, will not scratch your hand 【Easy to Use】: Teaching ruler is designed with a removable handle, lightweight, and easy to hold, making it an ideal drawing aid for teachers 【Widely Used】: Math geometry teaching ruler is an essential tool for , engineers, artists, designers, teachers, etc 【Math Teacher Aids】: Large Straight Ruler for geometry drawing and math lessons, suitable for classroom, school, or office