Get the job done with this 12 pack of Avery 29866 Marks A Lot UltraDuty markers with XL wide chisel tips. Built for situations where standard permanent markers just aren't enough, Avery Marks A Lot UltraDuty markers are perfect for construction sites, warehouses, workshops and more. The bold fast-drying ink works great on plastic, wood, metal, corrugate and concrete. The durable XL chisel tip also works on abrasive, dusty, wet and oily surfaces without clogging. The angled 18mm chisel tip allows you to write lines in varying widths to switch from narrow to bold on the spot. Specially engineered to resist water, abrasion and smearing, the heavy duty ink makes sure that your writing will last through even the harshest of conditions. The durable ink is designed to last and won't dry out when the cap is left off for up to 72 hours. The cap also features a useful anti-roll bump to help prevent rolling. Includes 12 black Avery markers. Please Note: The industrial-grade ink has a stronger odor than traditional permanent markers.