Package of 12 White Ferrules for use on Iron shafts. Dimensions .375" x .528" x 1" Length. Bohning manufactures high quality ferrules for use in Golf Club Building and Golf Club Repair. All Bohning ferrules have a 20 degree countersink in the bottom inside diameter to allow a cushion of epoxy to form, preventing shaft breakage. Bohning Golf Ferrulesare manufactured in Lake City, Michigan.