The cleveland 588 altitude steel shaft irons made to help you hit longer and highernew from cleveland in 2013 the 588 altitude steel hybrid irons with a promise of extreme forgiveness through every stroke with a hybrid feel meaning all golfers will find it easier to control their hits when using these irons and with interchangeable heads that can be mixed and match with the 588 mt and tt irons cleveland have allowed you to build your own perfect setaimed at players seeking super game impr