Features: 2 standard for your option: 7-inch/12-inch. Manufactured of high quality aluminum alloy, resistant and durable,not easy to break. Triangle, meter square, protractor, line guide and - guide, multifunctional tool, triangular ruler suitable for measurement and reading. Features metric and measurements with clear graduation,embossed graduations and common rafter conversion table. The triangle metric ruler can be used as a protractor,miters,line scriber-,- guide and tri-/meter square,framing square and a ruler,ideal- for all building and remodeling projects. Specifications: Material: aluminum-alloy Standard: 7-inch/12-inch(optional) Note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xTriangle Ruler