Multiple Size Tap Set, Hand Tap, High Speed Steel, Number of Pieces 10, Thread Sizes Included 1/2 In. -13, 1/2 In. -20, 1/4 In. -20, 1/4 In. -28, 3/8 In. -16, 3/8 In. -24, 5/16 In. -18, 5/16 In. -24, 7/16 In. -14, 7/16 In. -20, Thread Standard UNC, UNF, Thread Direction Right Hand, Tap Finish Bright (Uncoated), Thread Limit H3, Case Type Metal Index, Drill Bit Sizes Included #3, #7, 25/64 in, 27/64 in, 29/64 in, 5/16 in, F, I, Q, U