[ThinkingPlus]

Some shafts have less "spine" or variation than others. I was at a Max Out golf in LA and saw a demonstration on a spine finder of Aerotech Steelfiber shafts. There was no discernible spine found for the Steelfiber shafts using their machine whereas other shafts showed very distinctive spines. It was a real eye opener. I play the Steelfiber shafts in my irons and they are very stable and a very nice alternative to lightweight steel shafts.