Nowadays, one of the problems that professional ceramic tile fitters are often faced with is making marks for cuts in ceramic tiles without them disappearing just by touching them or through the action of water, but which can be cleaned when you don’t need them without leaving a trace or a stain on the surface of the ceramic tile. Paying attention to this very specific need of professional ceramic tile fixers, the RUBI offer includes construction pencils. A special pencil for writing on wet and enamelled surfaces including ceramics, marble, granite, etc. The oily composition of the graphite lead in the RUBI construction pencil allows you to make any guiding markings or notes on any smooth or wet surface and makes it easier to clean with a simple damp cloth, leaving no trace on the glazed side of the ceramic tile. Another feature of the RUBI construction pencil is its triangular shape. The triangular pencils are best suited to the left hand without right-handed users having difficult when using them. At RUBI we have always been concerned about the health of professionals. The concept of ergonomics is always present within the design of our tools, as we believe that safety and minimizing the risk of injury at work are essential for health and proper performance. This range of accessories, like the other ranges in our catalogue, is designed to offer users time savings and increase efficiency in their work. At RUBI we are aware of the importance today of efficiency and time savings, so our product development managers are very focused on these concepts when designing new tools.