This product is a teaching protractor, which is made of ABS, magnet material, with good texture, sturdy and practical. Easy to install and use, it can be easily applied to your teaching, a very practical accessory that will meet your needs well. Features -Color:Transparent -Material:ABS, magnet -Size:51.00X29.80X4.00cm/20.04X11.71X1.57in -This triangle ruler provides a clear and unobstructed view of the drawing process due to its transparent material. -This triangle ruler can be securely attached to magnetic whiteboards or metal surfaces. -Allows for accurate drawing of various angles and shapes with its 60 degree design. -The measuring ruler serves as a versatile tool for mathematics, geometry, and physics. -This geometry drawing ruler is designed to be and , ensuring multiple uses. Package list: 1 x ruler 1 x handle