Modern, ergonomic compass perfect for all ages! Features a twist-lock that secures the legs in place for accurate circle size and guaranteed precision. Innovative Safety Tip automatically retracts when you close the compass legs, to avoid potential injuries in a bag or case. Integrated distance measuring arm is graduated in both inch and metric. 6" Shatter-resistant protractor & ruler made with translucent material and beveled edges, for easy pickup and use. 6 piece Math Kit includes: Plastic Locking Compass with Safety Tip, 6" Shatter-resistant Protractor, 6" Ruler, Pencil Sharpener, Eraser and Reusable Pouch. Includes 1 set in red, blue, green, or orange (no color choice).