Three-Piece Hand Tap Set, Tap Thread Size M3x 0.5, High Speed Steel, Bright (Uncoated), Thread Standard Metric Coarse, Thread Length 15.88 mm, Overall Length 49.21 mm, 75 Percent Thread Drill Size 2.50 mm, Thread Limit D3, Class of Fit 6H, Thread Direction Right Hand, Number of Flutes 3