Wow! Mechanical Pencils feature a unique triangular-shaped barrel to keep pencil from rolling off desks. Distinctive design stands out in a crowd. The grip on the see-through barrel makes it easy to hold. Use the handy clip to attach to pockets notebooks and more. Fully retractable tip protects pockets and purses. With the sliding sleeve technology you can keep writing even if your lead breaks. Eraser is capped to protect the surface and is refillable with Pentel Z2-1 eraser refill.