Spiral Point Tap, Thread Size 1/2 In. -13, UNC, Overall Length 3 3/8 in, Vanadium High Speed Steel, Bright (Uncoated), Right Hand, Thread Length 15/16 in, 75 Percent Thread Drill Size 0.4219 in, Thread Limit H3, Class of Fit JIS 2, Number of Flutes 3