Comparison of the XL tool and Gunsmith kit
The XL frame is 3 1/2″ x 3 1/2″
The Gunsmith kit frame is 3″ x 3″
The XL has more clearance for taller sights as in Ghost ring or Tactical sights.
It also has two more block sets (15 degree and smaller stepped blocks) for
M&P cores and Sig pro series etc..
It also comes with several shim blocks.