Description: With fixed tool, the ruler can be fixed where needed, which is more convenient to use and easier to operate. The measuring accuracy of the ruler is very high and there is no need to worry about errors. The easy-to-grip large knob allows it to be tightened more firmly. This ruler is made of aluminum alloy, which is anti-corrosion and durable. There are three sizes for you to choose from: 100mm, 120mm, 140mm. It is suitable for woodworking, drawing and so on. Item Name: Right Angle Ruler Material: Aluminum Alloy Application: Right Angle Positioning Surface Treatment: Anodizing Application Scene: Wood Clamp Fixture Size Details: Size: 10cm/3.9" (Approx.) 12cm/4.7" (Approx.) 14cm/5.5" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x 90 Degree Right Angle Positioning Block 2 x M8 Plastic Nut 2 x Adjustable Fixed Block 2 x 100mm Right Angle Screw