STAEDTLER® Lumocolor® Universal Permanent OHP Pen Fine Set 4 is a versatile tool designed to meet the demands of any workplace environment. Whether you're in an office, warehouse, school, or home, these pens deliver superior performance on all surfaces. From overhead film and glass to plastic, metal, and wood, the STAEDTLER Lumocolor permanent markers glide effortlessly, leaving behind a permanent, smudge-proof, and waterproof mark. Its fast-drying ink guarantees a clean finish with every use. Not only does it draw fine 0.6 mm lines, but it also features Dry Safe ink, a unique characteristic that allows the cap to be left off for days without the nib drying out. This ensures a longer-lasting and more robust finish, making these markers an essential addition to your stationery collection.