Get the job done with this 4 pack of Avery 29848 Marks A Lot UltraDuty markers with bullet 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 1mm bullet tip also works on abrasive, dusty, wet and oily surfaces without clogging. The sharp bullet tip also allows you to write lines with consistent widths for a cleaner look. 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 clip to help keep the markers secure in your pockets and to prevent rolling. Includes 2 black markers, 1 red marker and 1 blue marker. Please Note: The industrial-grade ink has a stronger odor than traditional permanent markers.