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Item #:
223233325
COMOWARE Cobalt Drill Bit Set- 21Pcs M42 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with
88% of respondents would recommend this to a friend
Item #:
223233325
XCD 172
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Order now and get it around Tuesday, November 24
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M35 Cobalt HSS is more suitable for hardened material.
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What Stands Out
High Cobalt Content
Made of 8% cobalt high-speed steel, these drill bits deliver enhanced durability and heat resistance, making them ideal for tough materials like hardened metal and stainless steel.
Versatile Applications
This 14-piece set efficiently drills through various materials, including metal, cast iron, wood, and plastic, providing versatility for DIY enthusiasts and professionals alike.
Convenient Storage Case
The indexed storage case ensures easy organization and quick access to bits, promoting efficiency and preventing loss, making it a valuable addition to any tool collection.
Product Details
| Brand Name | COMOWARE |
| Model | TGJobberM42-21P |
| Set Name | 21Pcs M42 High Speed Steel Twist Jobber Length Drill Bit Set |
| Unit Count | 1 Count |
| Manufacturer | COMOWARE |
| Part Number | TGJobberM42-21P |
| Number of Pieces | 21 |
| Cutting Diameter | 0.5 inches |
| Minimum Bore Diameter | 0.06 inches |
| Material Type | M42 8% Cobalt High Speed Steel |
| Finish Types | Oxide |
| Shank Type | Round |
| Surface Recommendation | Wood, Platstic, Metal, Copper, Aluminum, Steel Sheet, Stainless Steel |
| Cutting Angle String | 135 degrees |
| Tool Flute Type | Spiral |
| Point Style | Split Point |
| Number of Flutes | 2 |
| Material | M42 8% Cobalt High Speed Steel |
| Finish Type | Oxide |
| Item Weight | 2.5 lbs (1.13 kg) |
Who Should Buy?
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Professional Mechanics
Ideal for mechanics working with hardened metals who need durable, high-speed drill bits for precise applications.
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Metal Fabricators
Perfect for fabricators cutting through stainless steel and cast iron, providing efficiency with sharp, robust bits.
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Woodworkers
Beneficial for woodworkers seeking versatility, as these bits can also effectively drill into wood and plastic.
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Casual DIYers
Infrequent users might find this set excessive for basic home projects or light materials without demanding performance.
Product Description
COMOWARE Cobalt Drill Bit Set- 21Pcs M42 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Indexed Storage Case, 1/16"-1/2"
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What materials can this drill bit set cut through?
Answer: This drill bit set is particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, and titanium alloy. It can also be used for softer materials. -
Question:
Is this drill bit set durable?
Answer: Yes, this drill bit set is made of M35 Cobalt HSS which offers higher durability, heat resistance, and abrasion resistance. -
Question:
Does the set include a holder for easy storage?
Answer: Yes, this set includes a drill bit holder with a size index for easy storage and organizing. -
Question:
What should I use for hanging blinds on a steel/metal door?
Answer: You can, but you would need cutting oil! -
Question:
How well will these bits hold against 3/4” hardened steel?
Answer: They will not drill hardened steel. Other cobalt sets work better, but the only luck I have had with hardened steel is a diamond hole saw for porcelain with constant water over the bit. -
Question:
Can I order a replacement drill bit if I break one of the uncommon bits in the large set?
Answer: Those bits are excellent for stainless, just start with little pressure. They are so inexpensive compared to the name brand, I would buy another set. -
Question:
What are the dimensions of the actual drill index box?
Answer: The dimensions are 14 1/4" long X 4 1/4" wide X 2 1/2" deep. The picture shows a gray color box, but mine is black. -
Question:
Do these bits work with an impact drill?
Answer: Only if you are drilling wood. If you are trying to drill steel and concrete, they will not work. Concrete will definitely destroy your bits. Soft steel, you may be okay. -
Question:
Where are these bits made?
Answer: China -
Question:
Can these be used with any kind of drill?
Answer: Pretty much any kind of drill, yes. Nearly any drill you buy (with the exception of very specialized ones) has an adjustable chuck that will work with these bits. They will not work with an impact driver, though. -
Question:
Are these split tip drill bits?
Answer: No, they are not.
COMOWARE Jobber Drill Bits Editorial Review
COMOWARE 29-Piece Cobalt Drill Bit Set, High-Speed Steel Black and Gold Finish with 135 Degree Split Point Tip, 1/16" to 1/2" x 64ths Increments offers a comprehensive solution for drilling needs across various materials. Users have praised the set for its durability, with many highlighting the ability to drill through steel without dulling quickly. This high-speed steel set features a split point design, enhancing precision and reducing walk-off while starting. However, it's worth noting that while they perform exceptionally well on softer metals, caution is advised when drilling hardened steel, as some bits may chip under such conditions. Overall, users find this drill bit set surprisingly effective for a budget-friendly option, making it a valuable addition to any toolkit.
Customer Reviews & Ratings
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Pros
- Durable and sharp drill bits
- Effective for various materials
- Split point design avoids walk-off
- Versatile for both wood and metal
- Affordable compared to competitors
Cons
- Not ideal for drilling hardened steel
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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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8 September 2026 · via Trustpilot
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XCD 172
Order now and get it around Tuesday, November 24
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Features & Benefits
- M35 Cobalt HSS is more suitable for hardened material.
- Durable, Higher Heat & Abrasion Resistance.
- Prevent walking, clear chips and particles faster.
- Particularly successful in cutting through hard metals.
- Can be used for softer materials.
- Set includes the drill bit holder with size index for easy storage and organizing.
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