General description Each set includes 2 construction pencils (one black and one blue) and 18 refills (6 red, 6 yellow, and 6 black), with each pencil pre-installed with a refill. The extended tip design allows for marking in hard-to-reach areas, making it ideal for drilling and other narrow spaces. Technical specifications Package includes: 2 construction pencils and 18 refills Refills: 6 red, 6 yellow, 6 black Material: High-quality metal and rubber Built-in sharpener: Yes Usage Suitable for marking on various surfaces including metal, plastic, glass, wood, and paper Designed for carpenters and masons for enhanced work efficiency Ergonomic design for comfortable handling and smooth writing