Capped Eraser Refill features a metal cap to provide a snug, secure fit in your mechanical pencil. Easy-to-use design requires you to simply pull out your depleted eraser and slide in a new one. High-quality construction erases cleanly to prevent smudges. Refill is designed for the Skilcraft American Classic Mechanical Pencil, Ergonomic Mechanical Pencil and others requiring a short, capped eraser (each sold separately).