Product Description: 1. High quality aluminum alloy handle, high resistance, light and stable 2. hole design, the ruler can be marked at an angle, and the centimeter hole is convenient to mark. 3. anti-drop handle, free hands without walking. 4. Insert drawing needle into the angle hole, and the included angle between drawing needle and the handle parallel to the desktop is the angle marked by the angle hole. Features Model:Multifunctional square ruler Usage scene: Woodworking survey and marking Material:Aluminum alloy colour: Black size: 40cm Note: With hole for drawing lines Package Contents: 1 x Multi functional Woodworking Right Angle Ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.