This item is well made of premium aluminum alloy material for durable and practical use. The marker is easy to use. Find the hole that corresponds to the scale, insert the pen into the hole, and draw the desired line.These rulers can be applied for home and office using, school students and teachers. The numbers are very clear and accurate, and it is able to be used for a long time. No edges, easy to store. Feature - Color: As shown. - Material: aluminum alloy. - Size: About 68x40x32 cm. - Follow the of the workpiece and draw the perfect position on the horizontal or vertical lines. The tiny scored holes and grooves accurately place the score on the target, making the woodworking ruler your tool. - Made of quality material, it is sturdy and wear resistant. - Each hole on the ruler represents one millimeter, and this versatile marking and gauge is suitable for a 0.5-1 mm filler. - Precise marking rules help you draw perfect horizontal lines while sliding rules along the working edge. - Suitable for home, office using, especially for for engineer, architect, student, draftman, artist, and so on. - Warm Tip: Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you