Black chisel markers are the workhorse. You're stencilling a crate, marking a beam, or tagging stock and you need bold, even coverage without the pen drying out mid-stroke. The UNI 580 industrial chisel is alcohol-based and xylene-free, so it works hard without the chemical hit. Smudge-proof. Waterproof. Adheres to almost any surface. Pack of 4 means the bench never runs dry
| brand | UNI |
| model | 580 |
| colour | Black |
| tip_type | Chisel |
| pack_size | Pack of 4 |
| formula | Alcohol-based, xylene-free |
| resistance | Smudge-proof, waterproof |
| suitable_surfaces | Almost any surface |
| grade | Industrial |
| category | Office Supplies |
| subcategory | Writing & Correction |