Product details Collared Golf Ferrules - Black - All Sizes The AU Golf Premium Collared ferrules for metal woods and iron/hybrid club 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 AU Golf 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. How to pick the correct ferrule Ferrule Length: Measure the length of the old ferrule. Ferrule inside diameter: Measure the shaft where the ferrule is going to sit. Ferrule outside diameter: Measure the club head hosel diameter at the top. Ferrule Colour: Match with old ferrule.
