.png)
.png)
.png)
.png)
.png)
.png)
.png)
.png)
.png)
.png)
.png)
.png)
Service Hotline
Call our Service Hotline or use our contact form.
1-877-BOSCH99 (1-877-267-2499)
Mon-Fri: 7:00-19:00 CST
21 pc. Cobalt M42 Drill Bit Set
.png)
.png)
.png)
.png)
.png)
.png)
.png)
.png)
Hover Image to Zoom
Hover Image to Zoom
CO21B
- Cobalt bits with upgraded M42 alloy for long life in hard metal
- Surface hardened with web-helix design and high heat resistance
- Drills stainless steel, cast iron, titanium, other hard metals
Benefits
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
Three-flat shank on bits 3/16 In. and larger
deliver better bit grip
High-heat resistant bits
withstand high-temperature applications for extended periods of time
Thick web-helix design
provides additional stability in tough applications
Surface-hardened tip
penetrates tough abrasive materials
Split points on bits 1/8 In. and larger
allow for easy starts with no skating, eliminating the need for a center punch
Technical Data
| Case Type | Plastic |
| Description | 21 pc. Cobalt M42 Drill Bit Set |
| Number of Pieces | 21.0 |
| Piece Count | 21.0 |
| Pieces | 21.0 |
| Includes | (2) 1/16", (2) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 11/64", (2) 3/16", (1) 13/64", (1) 7/32", (1) 15/64", (2) 1/4", (1) 5/16", (1) 3/8", (1) 1/2" |
CO21B
Includes
(2) 1/16", (2) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 11/64", (2) 3/16", (1) 13/64", (1) 7/32", (1) 15/64", (2) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"
CO21B
Includes
(2) 1/16", (2) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 11/64", (2) 3/16", (1) 13/64", (1) 7/32", (1) 15/64", (2) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"
CO14
Includes
(1) 1/16", (1) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 3/16", (1) 7/32", (1) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"
CO14B
Includes
(1) 1/16", (1) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 3/16", (1) 7/32", (1) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"
CO21
Includes
(2) 1/16", (2) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 11/64", (2) 3/16", (1) 13/64", (1) 7/32", (1) 15/64", (2) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"
CO4029
Includes
(1) 1/16”, (1) 5/64”, (1) 3/32”, (1) 7/64”, (1) 1/8”, (1) 9/64”, (1) 5/32”, (1) 11/64”, (1) 3/16”, (1) 13/64”, (1) 7/32”, (1) 15/64”, (1) 1/4”, (1) 17/64”, (1) 9/32”, (1) 19/64”, (1) 5/16”, (1) 21/64”, (1) 11/32”, (1) 23/64”, (1) 3/8”, (1) 25/64”, (1) 13/32”, (1) 27/64”, (1) 7/16”, (1) 29/64”, (1) 15/32”, (1) 31/64”, (1) 1/2”
Other sizes
CO14B
Description
14 pc. Cobalt M42 Drill Bit Set
Number of Pieces
14
Includes
(1) 1/16", (1) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 3/16", (1) 7/32", (1) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"
Case Type
Plastic
CO21
Description
21 pc. Cobalt Drill Bit Set
Number of Pieces
21
Includes
(2) 1/16", (2) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 11/64", (2) 3/16", (1) 13/64", (1) 7/32", (1) 15/64", (2) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"
Case Type
Plastic
CO14
Description
14 pc. Cobalt Drill Bit Set
Number of Pieces
14
Includes
(1) 1/16", (1) 5/64", (1) 3/32", (1) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 3/16", (1) 7/32", (1) 1/4", (1) 5/16", (1) 3/8", (1) 1/2"
Case Type
Plastic
CO4029
Description
29 pc. Metal Index Cobalt Drill Bit Set
Number of Pieces
29
Includes
(1) 1/16”, (1) 5/64”, (1) 3/32”, (1) 7/64”, (1) 1/8”, (1) 9/64”, (1) 5/32”, (1) 11/64”, (1) 3/16”, (1) 13/64”, (1) 7/32”, (1) 15/64”, (1) 1/4”, (1) 17/64”, (1) 9/32”, (1) 19/64”, (1) 5/16”, (1) 21/64”, (1) 11/32”, (1) 23/64”, (1) 3/8”, (1) 25/64”, (1) 13/32”, (1) 27/64”, (1) 7/16”, (1) 29/64”, (1) 15/32”, (1) 31/64”, (1) 1/2”
Case Type
Metal index