Function: With T-ruler marking, follows the edge of your workpiece to mark perfectly placed horizontal or vertical lines, micro-fine marking holes and slots place your mark exactly on target, makes the woodworking ruler a perfect tool for you. Aluminum alloy material: Made of aluminum alloy, it is wear-resistant, rust-proof and durable. It has torsion resistance, durability and corrosion resistance. Suitable for woodworking scribing. Compact size: Size: 6.8 x 4 x 3.8 cm, mini line ruler is easy to carry and easy to use. Each hole has a pitch of 0.5 mm, and accurate measurement helps you better complete woodworking. Easy to use: The marking ruler is accurate, versatile and easy to use. Find the hole corresponding to the scale, insert the pen into the hole and draw the desired line. Precise: The precise marking rulers can help you draw perfect horizontal lines while sliding the rulers along the working edge.