Drill through metal easily with help from this high-speed steel drill bit set. The drill bits make a great choice when working with stainless steel, aluminum alloy, titanium alloy, and other high hardness materials. Ideal for professionals & DIYers alike, the drill bit set comes in handy for a variety of projects, whether at home or on the job. Professional & Widely Use Bit – Drill through metal easily with help from this high-speed steel drill bit set. 135′ Split Point – The 135’quick-cut split point are self-centering and able to penetrate metals quickly with less pressure, prevent bits from “walking and wanding”. Easy cutting without need of center punch. High Speed Steel – Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit. Package Include USA Made Index Case – Metal index box keeps bits organized and sizes are clearly marked. Material: High Speed Steel M35 Cobalt Steel. Angle Point: 135 Degree. Shank Type: Straight Shank. Size: 1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″, 11/64″, 3/16″, 13/64″, 7/32″, 15/64″, 1/4″, 17/64″, 9/32″, 19/64″, 5/16″, 21/64″, 11/32″, 23/64″, 3/8″, 25/64″, 13/32″, 27/64″, 7/16″, 29/64″, 15/32″, 31/64″, and 1/2 inch. Index Case Made in USA: Yes.