The GolfWorks Premium Collared ferrules for .370" parallel iron heads with deep hosel countersunk hosels. Ferrule collar fits into the club head hosel to cushion contact point between the shaft and hosel to prevent graphite shaft breakage. The Collared ferrules also helps fill the voids of hosels with large countersunk hosels by centering the shaft during assembly on all club/shaft combinations. All of The GolfWorks ferrules are Pre Washed with high gloss finish and have a 19 degree countersink allowing a cushion of epoxy to form between the top of the hosel and the inside of the ferrule to prevent shaft breakage.
It is recommended to use The GolfWorks Oversized Collared Ferrule Installation Tool (GW0060) for installation