Description Function: With the T-ruler marking, 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 target, makes the woodworking ruler a perfect tool for you . Aluminum Alloy Material: Made of aluminum alloy, wear-resistant, rust-proof and durable. It has torsional strength, durability and corrosion resistance. Suitable for wood scribing. Compact size: 6.8 x 4 x 0.9 cm, mini ruler easy to carry and easy to use. Each hole has a 0.5mm pitch, and precise fine measurement helps you finish woodworking better. Easy to Use: The marking ruler is precise, versatile and easy to use. Find the hole that corresponds to the scale, insert the pen into the hole and draw the line you want. Precise: Precise marking rules can help you draw perfect horizontal lines while following the rules slide along the working edge.