Ben, I don't remember. I do remember that I never had to put any steel or other adapters up front, just heavier heads. I've been a woodie person all my life, but shot alums for several years to see what was so great about them back in the 80s....lol. I shot the soda straw carbons when they first came out and they shot well at 27", but I disliked the feel of the tiny shaft. I last shot carbons about 5 or 6 years ago and I think they've changed their spine availablities somewhat since then. As long as trees are grown, I'll be a woodie shooter...but I don't like to form opinions on tackle without giving it a fair, personal trial.