1,Aluminum Alloy Material: The marking ruler t type is made of aluminum alloy material, which is wear resistant and durable, not easy to rust 2,2 Backboard: The marking ruler t type has movable corner backboard and fixed corner backboard, which is easy to use 3,2 Usable Lengths: The marking ruler t type has two usable lengths, 280mm and 380mm, to meet the needs of your woodworking projects 4,Scope of Application: The marking ruler t type is suitable for drawing required size and length on wood, grooving, positioning, splicing, inlaying, etc 5,Useful Tool: The marking ruler t type can help you draw lines exactly where you want, perfect for woodworking 1 x T Type Ruler Item Type:T Type RulerProduct Material: Aluminum AlloyUsable Length: Approx. 280mm/ 11.0in, Approx. 380mm/ 15.0in Note: 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.