It appears that the National Ignition Facility is on the verge of producing fusion power by employing the world’s largest number 2 pencil. See the sixth image in their photo gallery: https://lasers.llnl.gov/multimedia/photo_gallery/
Who knew? 
The target positioner? You’d think they’d get with the times and at least use a laser pointer.
How big a pencil sharpener would you need for that?