Package includes: 1 shatterproof plastic box; 3 graphic compasses, 1 ruling pen, 1 dull locating pin, 1 extension bar safe pin, 2 pencil refills, 1 mechanical pencil; Robust plastic case for protecting and storing tools in one place in a backpack or desk. High quality: The professional compasses are made by aluminum and stainless steel. Durable and easy carry. Extension Beam Design: An Extension Beam attaches to the big Compass for drawing large circles. You can draw larger circle without lots of measuring and connect dots. Interchangeable attachments, a slip handle for pens, pencils, stylus or markers Wide use: The drafting set is a fantastic assistant for those working in machine design, Geometry compass set is suitable for architects, engineers, draftsmen, builders, roofers, teachers and students, This tool is perfect for DIY handymen and artists for a variety of geometry tasks