Tri Eraser offers a triangular shaped barrel that stabilizes finger grip and prevents rolling of flat surfaces. Pointed corners and angled edges are designed for detailed erasing. Quiet top click retracting action makes it handy and convenient. Eraser is nonabrasive and removes pencil markings cleanly and completely. Sturdy, molded clip easily attaches to pockets and notebooks so you can take it with you throughout your busy day. Refillable.