Product Features: 1. Aluminum alloy material, CNC machining center precision manufacturing; 2. It is suitable for quick line drawing in woodworking industry; 3. At the required size hole, use a water-based pencil to draw lines. ALUMINUM ALLOY MATERIAL: The woodworking ruler is made of high quality aluminum alloy, which is wear-resistant and rust-resistant, and has a long service life. HOW TO USE: Each hole represents 1mm, find the corresponding hole, place the refill in the hole, move the ruler and draw the line you want. Note: Each hole on the T-type ruler represents one millimeter. This multi-function mark and measuring ruler is suitable for 0.5-1mm refills. T-TYPE: The woodworking marking ruler is T-shaped, can be drawn horizontally, or vertical line, can be drawn 5-159mm vertical line distance. FUNCTION: Suitable for drawing required size and length on wood, grooving, positioning, splicing, inlaying etc. Scope of delivery: One piece