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. Narrow chisel tip is ideal for both highlighting and underlining. Ink is quick-drying odorless and certified AP nontoxic.