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