Chisel tip markers allow you to create lines in various widths with a resilient tip that won't fray with use Permanent marker ink dries quickly when used to avoid smudging Wear and water resistant ink makes these the best markers for writing on boxes, marking sports gear, labeling plastic containers and more ACMI certified as non-toxic, these permanent markers are also low-odor and conform to ASTM D4236 Write smoothly on practically any surface including paper, cardboard, metal, PVC piping, concrete walls, plastic containers and ceramic tiles