Choose from our SET SKU's or customize your own by size and length. Set1 has Tap Sizes 0-#6, #8, #10, #12, 1/4, 5/16, 3/8, 7/16, 1/2 Set2 has Tap Sizes 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16 Set3 has Tap Sizes 1", 1-1/8, 1-1/4 Remember you can change out old-worn Taps and keep the Extension. Why wait for delivery when you can have the Extension length already on hand for that next project/application!