Update: Sold out.

Pentel Sharp Mechanical Pencil, 0.7mm Metallic Barrels, Refill Eraser – Link

Amazon has this currently marked down to just $1!

• Pentel’s #1 selling mechanical pencil
• Superior construction meets the rigorous demands of professionals and students alike
• 4mm tip length makes it ideal for use with rulers and templates
• Pre-loaded with Pentel Super Hi-Polymer HB lead; never needs sharpening, is super strong and produces a clear dark line
• Available in 0. 5mm, 0. 7mm and 0. 9mm lead sizes