The Pentel Graph Gear 1000 Automatic Drafting Pencil PENPG1015A features an extra-long 4mm fixed sleeve that is ideal for precision drafting. With a heavy spring mechanism, the tip can be retracted by clicking the pocket clip, ensuring durability and safety. Its finely chiseled metallic grip is designed with soft rubber pads for added comfort during use. This automatic pencil is also refillable with Pentel's Super Hi-Polymer Lead and Z21 refill eraser.