Laurie asked me what taper I wanted, did I want Jerry's taper, pro taper, etc. Not knowing any better I ordered Jerry's taper which was a HUGE mistake. It was a CONICAL taper! I had to have the shafts redone by someone else because I couldn't play with them like that. The second one I ordered I ordered pro taper, I think with 13 mm. This was when Jerry was still alive. I never had the shafts changed on that one and played with it daily for several years before I sold it to cover a mortgage payment.