Combination Drill and Tap Set, Number of Pieces 6, High Speed Steel, Bright (Uncoated), Thread Sizes Included 1/4 In.-20, #10-24, #10-32, #12-24, #6-32, #8-32, Thread Standard UNC, Thread Direction Right Hand, Coolant Fed Non-Coolant Through, Case Type Plastic, Tap Type Twist Drill and Plug Tap, Thread Type UNC