Item Type: Rafter Square Material: Aluminum alloy Color: Silver Size: Approx. 18 x 18.5 x 25.5cm / 7 x 7.3 x 10in Thickness: Approx. 5mm / 0.2in Length: Approx. 7in / 18cm 1MULTIFUNCTIONAL: You can use this ruler not only to measure angles, but also to draw straight lines, which is very convenient. 2ALUMINUM ALLOY: The triangle ruler is made of wear resistant aluminum alloy, sturdy, rust free, lighter and easier to use than other metals. 3FUNCTIONAL TOOL: The large triangle of this ruler contains a small triangle and a straight line shape inside, which can better meet the needed. 4CLEAR SCALE: The scale on this ruler has both imperial and metric units, so you can clearly see the value being measured. 5EASY TO PLACE: This ruler has a bottom at one end that can be stood up and placed by the user without taking up space.1 x RafterSquare