Amazon.com : Pentel GraphGear 500 Automatic Drafting Pencils - PG523E, PG525A, PG527C, PG529N, 1 for Each : Office Products
Amazon.com : Pentel Graph Gear 500 Automatic Drafting Pencil with Lead and Mini Eraser, 0.5 mm (PG525LEBP),Black,1 Pack w/ Lead & Eraser : Mechanical Pencils : Office Products
Graph Gear 500 Drafting Pencil by Pentel – Little Otsu
GraphGear 500 Mechanical Drafting Pencil — Pentel of America, Ltd.