BIC 0.7 MM Assorted Xtra Life Mechanical Pencil Self-Feeding Design Provides Easy Lead Advancement. Long-Lasting BIC Mechanical Pencils Help You Stay Prepared With Plenty Of Lead. Each Pencil Contains An Equivalent Amount Of Lead As Is Found In 2-1/2 Woodcase Pencils. The Clip Attachment Helps Prevent The Loss Of Your Mechanical Pencil, Making It Easier To Use Each One For A Longer Amount Of Time.