Heavy Duty Cobalt Drill Bits
Our Cobalt High Speed drill bits are made of high speed Cobalt Steel. The Cobalt content adds high abrasion resistance to the already hard working properties if our bits. Heavy web construction and 135 degree Split-Point add to the long life of these bits. Available in sizes 1/32″ – 1/2″.
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Description
- High Speed Steel
- Ground Flute
- Heavy Duty Cobalt
- 135 degree Split Point
- Made in the USA
- NAS 907 Type B















The ThunderTwist’s TriCarb grade tip guarantees longer life with faster penetration due to increased chiseling action. ThunderTwist’s flute design, combined with copper brazing alloy creates the most reliable drill bit on the market. It is made with high quality American chrome-molybdenum nickel steel that is vacuum heat treated, and shot-peened for superior strength under the roughest conditions.




