The Maped Study 10 Piece Geometry Set is perfect for geometry, drawing and measuring because it comes with everything you need to get the job done! Durable metal compasses are ergonomically designed and work with compass leads or any standard pencil or thin pen. 6" Ruler, triangles and protractor are all made of crystal-clear material so you can easily see what you are measuring. Set comes packed in a reusable storage case and includes 2 Metal Study Compasses, 6" Ruler, 4" Protractor, 2 Triangles (45° & 30°/60°), Pencil for Compass, Pack of leads, Eraser and Pencil Sharpener.