1. Package comes with 1 pack triangle ruler, 1 pack straight ruler, 1 pack protractor.  Conventional handy size for home, school or work using, lightweight and portable to carry around with you. 2. Made from premium pure brass material, exquisite handmade workmanship, smooth polish surface, clear and accurate scale lines, easy to read and measure. 3. Due to its strong durability and high strength, it is not easy to break like plastic, this math geometry tool is useful in architecture, engineering, arts, designing and school use. 4. Brass has the poly degeneration of colour and lustre, as the use will gradually natural oxidation, the colour and lustre will change with oxidation, formed a characteristic restoring ancient flavor, full of time feeling. 5. It is a practical little gift for students, kids, teachers, architects, engineers, schoolmates, etc, durable material made, it will last a lifetime using.