Professional marking pen in black and other colors for numerous materials water; ink, oil and smudge-proof. Quick-drying and low odor; Durable tips in various widths; Body of Bi-material for comfortable grip; marking of cement. Concrete surfaces, copper roofing materials, fasteners, tools and accessories, wood and metal, copper and iron pipes; With easily clip on your belt to attach; Ideal for: electricians, general contractors, installers and industrial users.