#36, #29, #25, #21, #7 Drill, F to U Drill, #6-32 to 1/2-13 Tap, Spiral Point Tap and Drill Set Bright Finish High Speed Steel Drills, Bright Finish High Speed Steel Taps, Plug Chamfer, 18 Piece Set | 59337543

59337543 #36, #29, #25, #21, #7 DRILL, F Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic. High Speed Steel (HSS) provides good wear-resistance and can be used in general purpose applications for both ferrous and nonferrous material Plug chamfers are the most commonly used chamfer and designed for efficiently threading through and blind holes. They have 3 to 5 threads. Spiral point taps are used for tapping through holes. They have a flute geometry that shoots chips ahead of the cutting action to reduce loading and clogging within the flute.