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Mechanical pencil - Wikipedia
Mechanical Pencils - Household Commodities
Mechanical pencil - Wikipedia
Amazon.com : 5.6mm Mechanical Pencil Lead Holder with Clip Metal Mechanical Clutch with Built-in Sharpener Automatic Graphite Pencil Lead Pencil For Construction, Draft Drawing, Crafting, Art Sketching : Office Products
Amazon.com : BIC Xtra-Precision Mechanical Pencil, Metallic Barrel, Fine Point (0.5mm), 24-Count, Doesn't Smudge and Erases Cleanly : Office Products