WESTCOTT TEACHING TOOLS 5 PCS Geometry set for dry erase boards includes a compass with white board marker holder and nonslip foot, protractor, 30-60-90 triangle, 45-45-90 triangle, and a 60cm ruler. Each tool features a handle and a magnet for convenient placement. Compass has an adjustable grip to fit most markers. Geometry set for dry erase board tools feature both Imperial and metric graduation markings. Made from durable, lightweight plastic. Geometry set is easy to use for classroom demonstrations.