Catalyst is the next step in graphite iron design. Featuring our new Iso-6 material technology, Catalyst is engineered to replicate steel alloy properties over 100% better than traditional graphite laminates. This allows for an extremely stable shaft that maximizes constancy and distance control while providing the benefits of a graphite body design. Catalyst also features a reinforced tip section which, unlike traditional graphite, delivers torsional resistance comparable to that of steel; improving stability during turf interaction for better impact on less than perfect shots.MODERATE TEMPOTempo is not how fast you swing it, it is how you swing it fast. Tempo will affect how you load and unload the shaft and is a big factor in which shaft will best suit you. A player with a quicker backswing and more aggressive transition will have a faster tempo, while a player with a slower backswing and smoother transition will have a more deliberate tempo.MEDIUM TRAJECTORYTrajectory is the flight of the ball and the peak height that the ball reaches. A player who struggles with getting the ball in the air should look towards a higher trajectory shaft, while a player who struggles hitting the ball too high should look for a lower trajectory shaft.MEDIUM SPINSpin is the amount of backspin that the ball has. The designs of certain golf shafts can promote more or less spin so keep this in mind when looking for a shaft to maximize your game.SPECIFICATIONS TRIMMING GUIDE Please remember the following are general rules for assembling your clubs: ? Taper tip shafts should never be tip trimmed because they are designed to discrete lengths. Butt trim taper tip shafts to finished length. ? Butt trim shafts to finished length after tip trimming unless specified.