AH1213 Study Compass and Geometry Kit, 7-Piece Assortment with Shatterproof Box /w Automatic Refillable Pencil! 7 pieces enclosed in a shatterproof box for protection and organization + 4 pcs drafting tools (12cm ruler, 2 triangle rulers, 1 half circle angle measurer) Ergonomic and easy to use Kit includes Graphic Compass with holder+ automatic pencil + Study Compass, eraser, ruler, 2 set squares, one half circle angle measurer.