I use a plank of white ash. Hickory is great but I prefer ash. it seems to let less of the vibration, from impact, from traveling up my hand and arm. But thats just my belief. If you hit hickory on something hard it gives you a high, hollow, dinging sound, ash when you hit it sounds more of a deep thud sound. I'm not for certain but I believe that ash is just a hair softer, which seems to absorb more vibration. But I could have it all wrong. I use 48" sander to form my handles, you can knock out a few of them in pretty good time!