Pen-style highlighters offer a versatile loop that ensures you"ll never lose your highlighter. Easily attach to three-ring binders, planners, bags and more. Visible ink supply alerts you before you run out of ink. Pigmented, fluorescent ink presents bold colors, and the smooth ink flow offers consistent highlighting. Versatile chisel tip is ideal for both highlighting and underlining. Ink is quick-drying, odorless and certified AP nontoxic..