The ferrule for the PXG Irons has a special Deep Collar and a outside diameter that only fits the Factory Irons perfectly.
Available in .370 Parallel Tip and a .355 Taper Tip w/Cup
Please Note* The .355 Ferrule comes with a special tip cup spacer for their Iron Hosels they need this cup spacer for the proper fit using .355 Taper tip shafts. These are included with ferrule.
Also please remove any debris in the hosel, it will impede the insertion on the bottom spacer cup if not cleaned.