Made a few handles for my knives that came with plastic ferrules. The octagon is made of apple/cherry/pear (don't remember but from my own back yard) wood and buffalo horn, the D shaped is oak with buffalo horn.
Octagon handle is for my Santoku from Hideyuki Tanaka and the big D shaped one is for my 165 Shimatani Deba.
Filing the tang hole is heavy work, especially with hard woods. Took me a few hours but I got them good enough to tap in without glue.
Too bad the images don't do the polish any justice since I got the horn to a shine from 180 to 3000grit paper and used a polishing machine with M83 to finish off the shine. I'm not too good with photography!
Making the horn fit without glue is an art and I don't imagine I can make a handle without glue just yet but I guess it can be done. Mine are pretty tight but still I used epoxy to glue the ferrule on.
I'll be making some more because there are still two knives with plastic ferrules that need changing!