The Quick Dock Mechanical Pencil from Pentel features a unique all-in-one cartridge system with 12 pre-loaded HB lead. The lead feeds continuously and the transparent barrel helps you monitor the lead supply. There is a contoured latex-free grip for writing comfort and an extra-long twist-up eraser. 0.5mm lead for fine lines. This set comes with 1 refill cartridge and 3 refill erasers.