Die Set Hex Solid Carbon Steel Number of Dies in Set 8 Thread Sizes Included 1/2 In.-20 1/4 In.-28 3/4 In.-16 3/8 In.-24 5/16 In.-24 5/8 In.-18 7/16 In.-20 9/16 In.-18 Thread Standard UNC Thread Direction Right Hand Die Sizes included 1/2 in 1/4 in 3/4 in 3/8 in 5/16 in 5/8 in 7/16 in 9/16 in Case Type Metal Hex Sizes Included 1/2 In.-20 1/4 In.-28 3/4 In.-16 3/8 In.-24 5/16 In.-24 5/8 In.-18 7/16 In.-20 9/16 In.-18