The pencil I use comes in 0.5, 0.7 and 2mm lead holder variants. The 0.5 doesn't need sharpening, which is the main reason I use one. Plus I'm an engineer, not

The pencil I use comes in 0.5, 0.7 and 2mm lead holder variants. The 0.5 doesn't need sharpening, which is the main reason I use one. Plus I'm an engineer, not a pencil collector :) http://www.rotring.com/en/mechanical-pencils/265-rapid-pro-mechanical-pencil-3501170949351.html http://www.rotring.com/en/mechanical-pencils/265-rapid-pro-m...