This 150mm T-Type Ruler Scriber MG40 helps you draw precise horizontal lines while sliding along the workpiece edge, suitable for drawing the required size and length for wood processing, construction, decoration, etc. Each hole on the T-type ruler represents 1mm, suitable for 0.5-1mm multi-function mark refills. MG40 is precise, versatile and easy to use. You can find the hole corresponding to the scale, insert the pen into the hole, and draw the desired line. This CNC machined ruler is made by aluminum alloy material providing wear-resistant, rust-proof and long life. MG40 is an ideal tool for precision multi-function straight lines marking.