BOSCH CO21B 21-Piece Assorted Set with Included Case Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum
- Cobalt M42 drill bit – provides upgraded M42 Cobalt jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum
- Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits
- High-heat resistant bits – withstand high-temperature applications for extended periods of time
- Thick web-helix design – provides additional stability in tough applications.Case Type:Plastic
- Surface-hardened tip – penetrates tough abrasive materials
![M42 Cobalt Metal Drill Bits](https://m.media-amazon.com/images/S/aplus-media/vc/2fdb424e-04e9-4702-885e-e85799d699fd.__CR0,2,1331,412_PT0_SX970_V1___.png)
![CO14B M42 Cobalt Drill Bit Set](https://m.media-amazon.com/images/S/aplus-media/vc/214c9772-c210-4054-9a53-ff22d3ca7a0d.__CR0,0,1000,1000_PT0_SX300_V1___.jpg)
Hard-Core M42 Alloy Cobalt Drill Bits
Bosch Cobalt M42 Metal Drill Bits are engineered with an upgraded M42 alloy, containing 8% cobalt. These hard-core cobalt bits deliver 10X life vs. standard bits and are designed for high heat resistance.
![M42 Cobalt drilling Steel](https://m.media-amazon.com/images/S/aplus-media/vc/06337ee9-a49c-4922-9618-8bb3b45e8eac.__CR0,0,1000,1000_PT0_SX220_V1___.jpg)
Superior Performance
Designed for durability and with high heat resistance for use in stainless steel, cast iron, titanium, light-gauge metal and aluminum.
![M42 Cobalt with Core18V](https://m.media-amazon.com/images/S/aplus-media/vc/a53bb02e-2a78-442b-9192-3f16bffb4629.__CR150,0,900,900_PT270_SX220_V1___.png)
No-Skate Tip
Fast, accurate starts reduce bit walking on material surface.
![Bosch M42 Cobalt Drill Bits](https://m.media-amazon.com/images/S/aplus-media/vc/4fe3e478-d9c2-4060-98ca-d12ee37902ed.__CR0,0,1000,1000_PT0_SX220_V1___.jpg)
M42 Grade Cobalt
10X longer life than standard Cobalt drill bits.
![M42 Cobalt Drill Bit](https://m.media-amazon.com/images/S/aplus-media/vc/573285ab-9941-42fd-b40b-19fadb636c9d.__CR0,0,1000,1000_PT0_SX220_V1___.jpg)
Thick Web-Helix Design
Fast material removal and increased stability.
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