Permanent ink isn't the only thing that lasts with these Large Chisel Tip Markers. Their larger-than-usual size delivers a correspondingly larger ink supply, and the ink is low-odor and certified nontoxic. The permanent ink marks virtually any surface, including metal and plastic, and resists water and rubbing to minimize smearing. The durable chisel tip lets you write with a variety of line widths, from bold, high-visibility strokes to smaller lines. With these long-lasting markers, you'll experience enduring satisfaction.