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X Utility Prototype

  - Callaway
Introduced in 2012, these hybrids were developed after testing by a number of PGA Tour players. They are hollow-forged from 1020 carbon steel and feature interchangeable tungsten sole weights and a maraging steel club-face. The company reports that the 24° version has become especially popular with tour players.

Available in 18°, 21°, and 24° models.