The Callaway X-20 generation doesn't include the Pro variant.
Iron Set
Used Callaway X-20 Pro Iron Set
2006
Pro Series heads are shorter from heel to toe with a thinner topline and noticeably less offset than the standard set, trading forgiveness for a flatter flight and cleaner feedback. Callaway retired the name after the X-18 and replaced it with Tour.
Model info
The Callaway X-20 generation also comes in 2 alternative iron set variants: Standard and Tour.
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