Learning Advantage 7592 Dry Erase Compass Whiteboard Compass DESIGNED FOR THE CLASSROOM--This oversized compass is perfect for teaching a class when using a whiteboard or chalkboard. It includes a suction cup and rubber foot which will help position the compass while drawing to ensure accuracy PAIRS WELL--Use in conjunction with our Dry Erase Magnetic Protractor, Dry Erase Magnetic Straight Edge and Dry Erase Magnetic Triangles to complete the classroom experience BUILT TO LAST--The compass is made from durable plastic which allows it to handle numerous drops and years of use in the class setting Legs measure 17 inches long and can hold markers or chalk with ease