10 Collar Ferrule OD .55" fit Callaway CF 16 17 Big Bertha Apex Epic .370 " Tip
No bubbles after ferrule turned or cracks during the installation. Fits Most of late Callaway irons after 2015 with. 370" hosel. Apex forged, CF-16, XR, Epic, SteelHead iron. 10single Silver Ring Easy Install Collar Iron Ferrules.