It is very easy and accurate to draw straight lines at 45 degrees and 135 degrees,1.Please allow 0.5cm error due to manual measurement. pls make sure you do not mind before you bid.Product net weight: 112.5gProduct process: anodized blackPackage includes:1x ruler; 1x eraser; 1x pencilType: Multifunctional Angle RulerWoodworking 45 135 degree scriber,lightweight and durable.Size: 213mm x 80mm x 68mmMaterial: Aluminum alloy2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.Color: black