Tired of Those Pesky Dead Eraser ends of Mechanical Pencils when you try to fill them up with lead? Now there is a solution! This works like a wine opener spiral, but small enough to dig into your eraser. There is no damage to the eraser if you use it 4-5 times, but after that, it may not grip onto that eraser quite as well.
Print 1 Eraser Cork for the whole thing, but if you do not like the medical cross at the bottom, you can print the NoCross one.
The cap might need a bit of convincing to fit on well, and there are three cutouts for the lid to go into (look at the design and you'll know what I'm talking about). There is also a stub on the base which when lined up with the center of the keychain handle, should allow the cap to fit snugly in
Usage is simple, stick the pointy bit into the eraser, put a bit of pressure, and just turn it. Once you feel like it's deep enough (preferably twist it until all of it's in) simply pull it out and fill your pencil with lead.
See it in Action Here https://youtu.be/kXjcPWdTAZc
Please Let me know how it is, Thanks!