Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.59 Golf club heads designed for clubs designated as 1-irons, 2-irons, 3-irons, 4-irons or 5-irons (provided for in subheading 9506.39.00) 2.0% No change No change On or before 12/31/2020 . 1638. Golf club hybrid heads Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.60 Golf club hybrid heads, each stamped or otherwise permanently marked as such (provided for in subheading 9506.39.00) Free No change No change On or before 12/31/2020 . 1639. Golf club wedge heads with a loft of 56 degrees or less Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.61 Golf club wedge heads, each stamped or permanently marked to indicate a loft of 56 degrees or less (provided for in subheading 9506.39.00) 0.7% No change No change On or before 12/31/2020 . 1640. Golf club iron heads of 6-Irons and 7-Irons Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.62 Golf club heads designed for clubs designated as 6-irons and 7-irons (provided for in subheading 9506.39.00) 2.0% No change No change On or before 12/31/2020 . 1641. Golf club iron heads of 8-Irons and 9-Irons Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.63 Golf club heads designed for clubs designated as 8-irons and 9-irons (provided for in subheading 9506.39.00) 0.8% No change No change On or before 12/31/2020 . 1642. Golf club heads with a loft greater than 56 degrees Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.64 Golf club wedge heads, each stamped or otherwise permanently marked to indicate a loft of greater than 56 degrees (provided for in subheading 9506.39.00) Free No change No change On or before 12/31/2020 . 1643. Golf club putter heads Subchapter II of chapter 99