The Ohto Promecha 1500P is a professional drafting/drawing pencil that's in a league of its own.

A user can customize everything from the length of lead dispensed with each click to the length of the guide pipe. By twisting the grip, you can adjust the lead sleeve length from 0 mm to 4 mm. And by twisting the rotating component inside the window, you can adjust the length of lead extended with each click from 0.2 mm to 2 mm. This pencil also features an adjustable lead grade indicator and a removable clip, and has a full aluminum body.