Inspired by the Blackwing style eraser holder. Slips onto a standard hexagonal pencil. Has a cavity on the inside that conforms to the shape of a sharpened pencil to protect the pencil tip during transport.
You will need to cut the eraser yourself to fit. I designed the holder based off Staedtler Large Erasers. You simply need to cut 4.5mm slices off the eraser, insert the slice into the clip, and press the clip and eraser into the holder. Cutting the eraser can be surprisingly tricky and you may need to adjust the size afterwards: Err on the side of too large as you can trim it down, but too small won't work at all.
Functions as intended and is worlds better than the cheap erasers that are often included with pencils.
For printing purposes you should be able to print the clip directly on the bed. However the holder I recommend printing vertically with a brim. I have had the best results printing in this manor.
Picture of eraser used Below: