The Inkzall Markers in black are a set of four pens specifically designed for use on rough surfaces such as OSB and concrete. These markers stand out for their versatility and can be used on wet, greasy, dusty, rusty, and dirty surfaces, making them an ideal tool for various applications. With a line width of 3 millimeters, they allow for precise and clear markings. The quick-drying ink ensures that the writing dries quickly, enabling immediate further processing without smudging. Made in Germany, these markers offer reliable quality and performance. The color group is black, which ensures clear visibility on different materials. This set is a practical addition to any workshop or construction site where robust and durable marking solutions are required.