Plucking fiber through that hole in your diz can be made easier with the use of this little tool. Put it through the hole, tuck some fiber through the loop, and pull. Done!
Others use this to tie off short threads in needlework. There are so many uses I can't list them all.
Diz threaders can be anywhere from an inch and a half long up to three inches long. Most will be thin, but if your fingers prefer a plumper tool, that can be made too.