The safety compass/protractor with swing arm is perfect for drawing circle and learning about angles. Set includes 1 Safety Compass which creates accurate circles up to 12" in diameter. Features positive pencil lock. Complete with pencil, inch and centimeter guide. Set also has a 6" Swing arm plastic protractor, which features an open center, sharply defined graduations and is complete with a 6" ruler. Sold as a pack of 12 sets.