Tap and Die Set Number of Pieces 25 Die Shape Round Tap Type Hand Tap Die Material High Speed Steel Thread Sizes Included 1/2 In.-13 NC 1/2 In.-20 NF 1/4 In.-20 NC 1/4 In.-28 NF 1/8 In.-27 NPT 3/8 In.-16 NC 3/8 In.-24 NF 5/16 In.-18 NC 5/16 In.-24 NF 7/16 In.-14 NC 7/16 In.-20 NF Die Thread Sizes Included 1/2 In.-13 NC 1/2 In.-20 NF 1/4 In.-20 NC 1/4 In.-28 NF 1/8 In.-27 NPT 3/8 In.-16 NC 3/8 In.-24 NF 5/16 In.-18 NC 5/16 In.-24 NF 7/16 In.-14 NC 7/16 In.-20 NF