after watching Patrick's videos, then seeing it first hand....you grab anything that resembles a rock, smack a pressure flaking what your holding under your leg, and 15minutes later a oober thin, ooober tiny bird point comes out

Seriously, watch Jackcrafty's videos on youtube, he has several threads on here refering to them, Id put his youtube handle up, but I can't spell hobbit/hobit....Allergichobbit or something to that effect, on youtube. I've gotten mixed results with it using copper and on various materials, but using a whitetail billet and rhyolite, it helps me when making rhyolite bifaces.