with waterproof? MULTI-USE? Marking chalk, extremely insensitive and versatile for waterproof markings on almost all material surfaces, highly economical: 1 lead replaces up to 5 conventional ink or lacquer markers, patented high-tech rotating mechanism for quick and easy handling, practical quiver protector with clip for perfect insertion Hand-operated, extremely durable and environmentally friendly thanks to high-quality product technology and refillability, refill never dries out? always full power from the first to the last line, blue, white and black chloride-free for marking on stainless steel, avoid mine temperatures above 40 ° C