Features: 1.Made of high quality aluminum alloy material, is wear-resistant, rust-proof, durable and hard to break. Suitable for architectural drawing design, carpentry, etc. 2.Precise Marking for T Rule follows the edge of your work piece to mark perfectly placed horizontal or vertical lines, micro-fine marking holes and slots place your mark exactly on the right place, makes the woodworking ruler a perfect tool for you. 3.Find the hole corresponding to the scale, insert the pen into the hole, and draw the desired line.Can be used as the strike size of parallel lines. Accurate scale, wear-resistant and rust-resistant. 4.Portable Hole Ruler: Small for T Ruler-300mm: About 300x12cm/118011x4.72in; Large for T Ruler-400mm: About 400x12cm/157.48x4.72in, can be storaged in you pen bag or ttool box. Easy to carry and use. 5.The Woodworking scriber is precisely what you need for layout and measurement along the edge of a board or other workpiece. Micro-fine marking holes at every scale line allow you to instantly locate your for sharp pencil point. Specifications: Material: Aluminum Alloy Color: Red Type: 300mm/11.81in; 400mm/15.75in Size: Approx. 17cm/7.70in Weight: Approx. 305g Package Includes: Package includes: 1 Piece Woodworking Scriber Ruler note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!