Quick Dock mechanical pencils let you write for weeks without refilling your lead. Pencils come with 12 leads in a pre-filled cartridge; it's like getting a whole lead refill pack in your pencil at once! Cartridges make it a quick, simple, no-mess lead replacement when you finally need to refill. Mix and match cartridge and barrel colors allow fun color combinations (0.7mm only). Frequent mistakes are no match for the large and long-lasting, twist-up eraser. Pre-loaded with Pentel Super Hi-Polymer HB lead; never needs sharpening, is super strong and produces a clear dark line. Backed by Pentel's Limited Lifetime Warranty.