Of the three new sets of 588 Cleveland irons, the 588 Tour Trajectory (TT) irons are the most ambitious. Like the MT (Mid Trajectory) models, the TT irons are named after the flight pattern they produce – a lower, more piercing trajectory preferred by better players.
The 588 TT irons feature a constant clubface height throughout the set, but have a progressive face length to promote more forgiveness in the long irons and a more penetrating, controlled trajectory in the short irons. The 588 TTs also have forged clubfaces to enhance feel and ball speed.
The clubheads include a modest cavity back with an engineered undercut to improve ball speed and accuracy on off-center hits, while a multi-material iron plaque of polymer and aluminum behind the face dampens vibration at impact for a more consistent feel.
In addition, the 588 TT irons, 588 MT irons and 588 Altitude irons can be easily interchanged to customize a set with the preferred combination of ball flight, feel and forgiveness.
The standard TT set includes a 4-iron through ''D'' wedge (a D wedge is a 50-degree wedge that works both a pitching wedge and sand wedge), though a 3-iron and standard sand wedge are also available. They retail for $699.99 per set with steel shafts and $799.99 per set with graphite shafts.