1. High quality aluminum alloy, CNC precision machining, laser engraving scale. 2. Angle can be marked 22.5/30/45/60/67.5/90 Degree. 3. A wrench is included to split the ruler into two flat surfaces. Treatment: Anodized Usage Angle: 22.5°/30°/45°/60°/67.5°/90° Colour:Blue Material:Aluminum Alloy Package Contents: 1 x Woodworking square ruler Tool 1 x wrench (random colors, don't accept the specified color) 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.