Z-Grip Plus Mechanical Pencil makes writing easy, comfortable and fun. The shake advance technology allows you to optimally advance your lead with a simple shake. Not only does this add a little fun to your writing experience, but it also minimizes the chance for breakage to make your writing experience less frustrating and more enjoyable. Long-lasting, twist-up eraser completely removes your writing errors without smudging or damaging papers. Mechanical pencil is perfect for daily use at your home, office and school. Pencil is refillable with standard 0.7mm lead (sold separately).