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588 Altitude

  - Cleveland
Introduced in 2012, these are technically somewhere between game-improvement and hybrid irons. While they have hollow heads, these irons have a more narrow sole than most hybrids. The other big difference here is the forged face, which is intended to provide higher ball-speed and more feedback after impact.

The Altitude irons are designed to be easily interchangeable with the 588 TT and 588 MT irons, for simple customization of an iron set.