The Sharpie Pro Magnum Permanent Marker is rugged for long-lasting durability. Specially made for industrial users, the bold black marker writes on greasy, wet and oily surfaces, while the sturdy aluminum barrel withstands heavy use. The extra-wide chisel is designed to endure abuse and still mark while the extra-large ink supply won't quit on you. Sturdy, oversized chisel tip for extra-wide marks Permanent ink marks on wet and oily surfaces; great for use on plastic, wood, stone, foil, corrugate, and leather Quick-drying ink is fade- and water-resistant Durable aluminum body withstands heavy use This black Sharpie 12-pack lets you keep extras on hand.