Features: Multi color Hole Marking Pen Set (5 Pack) offer long tip precisions for drilling alignment, featuring permanent waterproof inks with plastic construction and integrated 30mm ruler. Engineered with 15mm extended nibs for narrow gaps, these fade resistant markers include measurement scales on the barrels and perform flawlessly on aluminum, wood, plastic, and concrete surfaces. Ideal for woodworkers, automotive technicians, and enthusiasts requiring industrial grade marking tools for construction projects or craft customization. Perfect for labeling drill points during furniture assembly, metal fabrication, or concrete formwork installations where moisture resistant markings are critical. The tapered 1.5mm fine tip creates crisps 0.3mm lines across vertical/horizontal orientations, making it essential for electrical box installations, shelf mounting, and machinery maintenance tasks. Specifications: Component: Plastic Color: Green/Black/Blue/Red Length: Approx. 5.2inch(13.2cm) Package Includes: 5PCS Marking Pen note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.