Maped compasses are ideal for learning geometry in school. The Maped stop system compass (set of 5 pcs) is a specially designed compass which makes learning geometry much more interesting. It also comes handy for professionals. Stop system function: This compass from Maped comes with a stop system function which prevents the legs from moving once the required amount of opening has been set. There is a flip down lever which locks the legs from moving. It holds the legs firmly which ensures accuracy while working. The compass has a needle protection cover ensuring safety of your fingers. Set of 5 pieces: It comes in a set of 5 pieces and is very easy to use. They are durable and last a long time.