Top Jobber Drill Bit Sets for Metal and Workshop Projects
Selecting the right jobber drill bit set depends on the hardness of the materials you encounter most frequently in your shop. While standard high-speed steel bits work for basic wood and plastic applications, specialized cobalt sets provide the heat resistance necessary for stainless steel, cast iron, and titanium. When choosing between sets, consider the number of pieces included, the shank design for chuck stability, and the tip geometry. A 135-degree split point is particularly useful for preventing walking on hard, slick surfaces. Whether you need a comprehensive range of sizes for professional fabrication or a compact kit for household repairs, evaluating the alloy composition and shank type ensures better performance and longevity for your drilling tasks.
This guide reviews various jobber drill bit sets, ranging from small 13-piece collections to extensive 276-piece master sets. Each option features specific design elements like three-flat shanks to reduce slippage in drill chucks or specialized M35 and M42 cobalt alloys for enhanced durability. By examining the material compatibility and size range of these sets, you can determine which kit suits your specific workshop requirements. From precision metalwork to general-purpose construction, these sets provide the necessary tools to handle everything from light-gauge metal to hardened alloys, ensuring you have the correct bit diameter on hand for every project.
1. HIGHFIRE 29 PCS M35 Cobalt Drill Bit Set, HSS Twist Jobber Drill Bits with 135 Degrees Split Point and Three-Flat Shank, 3/8” Reduced Shank, Gold Oxide Metal Drill Bits Set (1/16” - 1/2” x 1/64”)
This 29-piece set features M35 cobalt-infused high-speed steel, designed to handle demanding drilling tasks. The bits are engineered with a 135-degree split point, which helps minimize bit walking when starting holes in metal surfaces. A notable design feature is the three-flat shank, which promotes a secure grip within the drill chuck to prevent slipping during operation. The kit includes sizes ranging from 1/16 inch to 1/2 inch in 1/64-inch increments. Additionally, the bits incorporate a 3/8-inch reduced shank, making them compatible with a wider variety of standard drill drivers. Finished with gold oxide for visibility and heat resistance, this set offers a comprehensive range for users needing precise, incremental sizing for metal fabrication and general workshop maintenance.
Best for: Users needing incremental sizing for metal fabrication.
Check on AmazonHighlights
- M35 cobalt-infused steel construction
- 135-degree split point tip design
- 3/8-inch reduced shank for chuck compatibility
- Includes sizes from 1/16 to 1/2 inch
Keep in mind
- May have limited longevity in extremely heavy-duty industrial settings
- Reduced shank might slightly impact torque transfer on larger bits
2. BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Included Case - M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
The Bosch CO14B is a 14-piece set utilizing M42 cobalt steel, an alloy specifically chosen for its high heat resistance and durability when machining tough materials. This set is rated for use on stainless steel, cast iron, titanium, and light-gauge metal. Each bit features a three-flat shank, a configuration that helps secure the bit firmly in the chuck, reducing the risk of rotation under high-torque conditions. The inclusion of a dedicated storage case helps keep the pieces organized and protected between uses. As a smaller, high-performance set, it is well-suited for professionals or hobbyists who prioritize material compatibility and build quality over a high quantity of varying diameters. The cobalt construction helps maintain cutting efficiency in abrasive materials that would quickly dull standard bits.
Best for: Professionals working with stainless steel and titanium.
Check on AmazonHighlights
- M42 cobalt steel for superior heat resistance
- Three-flat shank design for secure chuck grip
- Specifically rated for titanium and stainless steel
- Includes a protective storage case
Keep in mind
- Limited number of pieces may not cover all diameter needs
- Higher price point per bit compared to larger, general-purpose sets
3. COMOWARE M35 Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs Tri-Flat Shanks High Speed Steel Twist Jobber Metal Drill Bits 1/16"-3/8", with Plastic Index Storage Case
For high-volume needs, this 99-piece set offers an extensive range of bits from 1/16 inch to 3/8 inch. The bits are constructed from M35 cobalt steel, providing the necessary hardness for drilling into hardened metal and stainless steel. The tri-flat shank design is integrated across the bits to ensure they remain stable in the chuck during operation. The set comes housed in a plastic index storage case, which is designed to keep the wide assortment of sizes organized and easily accessible. Because of the large quantity of pieces, this set is particularly useful for workshops that require frequent replacements or a constant supply of specific bit diameters. The jobber-length design maintains a balance between reach and structural integrity for standard metal drilling applications.
Best for: Workshops requiring a large inventory of replacement bits.
Check on AmazonHighlights
- Large 99-piece set for high-volume work
- M35 cobalt steel composition
- Tri-flat shanks to prevent chuck slippage
- Includes a dedicated plastic index case
Keep in mind
- Large case may take up significant workspace
- Extensive piece count might be excessive for casual home users
4. 13pcs Cobalt Drill Bits Set M35 HSS Jobber Drill Bits Set 1/16"-1/4" | 135 Degree Tip Design with Index Storage Box, for Hardened Metal, Stainless Steel, Cast Iron, Wood and Plastic
This 13-piece M35 HSS cobalt set is designed for versatility, covering a range of 1/16 inch to 1/4 inch. The bits feature a 135-degree tip design, which is intended to reduce drifting when starting holes in hard surfaces. This set is compatible with a wide array of materials, including hardened metal, stainless steel, cast iron, wood, and plastic. The inclusion of an index storage box ensures that these smaller-diameter bits remain organized and protected. Because of the limited size range, this set is most effective for light-duty metal projects or as a supplemental kit for specific hole sizes. The jobber length provides a standard reach, making these bits suitable for most handheld drill and drill press applications where precision is preferred.
Best for: Light-duty metal projects and general home repairs.
Check on AmazonHighlights
- M35 HSS cobalt construction
- 135-degree split point for accuracy
- Multi-material compatibility including wood and plastic
- Compact index storage box included
Keep in mind
- Smallest size range in this group
- May not be suitable for larger diameter drilling requirements
5. 276pc Titanium Twist Drill Bit Set with S2 Bits 135° Tip High Speed Steel, Size from 1/16" up to 1/2", Ideal in Wood Cast Iron Aluminum Alloy Plastic Fiberglass, Clear Lid Case
The 276-piece titanium twist drill bit set is designed for users who need a vast array of options for diverse materials, including wood, cast iron, aluminum alloy, plastic, and fiberglass. The bits are constructed from high-speed steel and feature a 135-degree tip for improved starting precision. The set covers a wide size range from 1/16 inch up to 1/2 inch, ensuring that almost any standard hole diameter can be accommodated. The bits arrive in a case with a clear lid, allowing for quick visual identification of the required bit size. While titanium-coated bits are excellent for general-purpose drilling in softer metals and wood, they are distinct from solid cobalt bits. This set is best for projects requiring frequent size changes across various materials.
Best for: Large-scale projects requiring many different bit sizes.
Check on AmazonHighlights
- Comprehensive 276-piece collection
- 135-degree tip for reduced walking
- Includes S2 bits for added versatility
- Clear lid case for easy size identification
Keep in mind
- Titanium coating may wear off faster than solid cobalt alloys
- Large set may be overwhelming for users with limited storage space
How to choose
Material Composition
When selecting a jobber drill bit set, material grade is paramount for longevity. M35 Cobalt, found in HIGHFIRE, COMOWARE, and the 13-piece set, provides enhanced heat resistance for drilling into hardened metals and stainless steel. Bosch utilizes M42 Cobalt, which is designed for demanding applications in titanium, cast iron, and stainless steel. Alternatively, titanium-coated high-speed steel (HSS) sets, such as the 276-piece collection, offer versatility for softer materials like wood, plastic, fiberglass, and aluminum. Always match the bit material to your specific project needs to ensure the tool maintains its cutting edge and resists premature dulling or breakage during operation.
Piece Count and Sizing
Jobber drill bit sets vary significantly in size range and quantity. If you require a comprehensive selection for a workshop, the 276-piece titanium set offers extensive coverage from 1/16" to 1/2". For specific metalworking tasks, the HIGHFIRE 29-piece set provides a professional range with 1/64" increments. Smaller sets like the 13-piece cobalt kit are optimized for tight 1/16" to 1/4" ranges, making them ideal for portability and specific small-diameter holes. Assess whether you need a broad variety of sizes for general repairs or a compact, specialized set for focused metal drilling to avoid unnecessary clutter in your tool storage.
Shank Design
The shank design determines how the bit interacts with your drill chuck. Many cobalt sets, including HIGHFIRE, BOSCH CO14B, and COMOWARE, feature a three-flat shank design. This geometry is engineered to provide a secure, non-slip grip in the drill chuck, which is essential when applying high torque to hard materials like stainless steel or cast iron. While some bits include a 3/8" reduced shank to fit smaller chucks, others maintain standard sizing. Always check the shank compatibility with your current power tool setup to ensure stable operation and prevent slippage while drilling into high-density materials.
Tip Geometry
Tip geometry dictates how easily a bit starts and stays on center. The 135-degree split point design, found in the HIGHFIRE and the 13-piece cobalt set, is a critical feature for metal drilling. This specific angle helps prevent the bit from "walking" or skittering across the surface of hard materials like stainless steel or cast iron when you first engage the drill. By providing an aggressive, self-centering start, the split point design improves accuracy and reduces the risk of marring your workpiece. Look for this feature if your primary goal is precision drilling in metal surfaces.
Storage and Organization
Proper storage protects your investment and ensures bits remain organized for quick access. Sets like COMOWARE and the 13-piece cobalt kit include dedicated index storage boxes, which are helpful for keeping individual bits sorted by size. The 276-piece titanium set features a clear-lid case, allowing for quick visual inspection of the inventory. Bosch also includes a case with their 14-piece cobalt set. When choosing a set, consider the durability of the storage case and whether the layout allows you to easily identify and retrieve the specific bit size required for your current task without searching through a disorganized pile.
Frequently asked questions
What is the primary difference between M35 and M42 cobalt bits?
Both M35 and M42 are high-speed steel alloys enhanced with cobalt for superior heat and wear resistance compared to standard HSS bits. M35 is commonly found in sets like HIGHFIRE and COMOWARE, suitable for stainless steel and hardened metals. The Bosch CO14B set uses M42, which is engineered for particularly demanding applications, including drilling into titanium, cast iron, and other heavy-duty metal surfaces.
Are three-flat shanks better for my drill?
Three-flat shanks are designed to provide a more secure connection between the drill bit and your drill chuck. By creating flat surfaces, these shanks help prevent the bit from spinning or slipping inside the chuck during high-torque applications. This is especially beneficial when working with tough materials like stainless steel, where consistent power transfer is required to prevent bit damage and ensure accurate, clean hole production.
Can I use a cobalt drill bit set on wood and plastic?
Yes, cobalt bits are capable of drilling through wood and plastic, as seen with the 13-piece cobalt set. However, cobalt bits are specifically engineered for the high heat and resistance encountered when cutting through hardened metals, stainless steel, and cast iron. While effective for wood or plastic, they may be overkill for these softer materials. Titanium-coated HSS sets are often preferred for general-purpose tasks including wood, fiberglass, and plastic.
Why is a 135-degree split point important for metal drilling?
The 135-degree split point is a specialized tip geometry that prevents the drill bit from walking across the surface of the material. When starting a hole in hard metals like stainless steel, a standard tip may slide around, causing inaccurate marks. The split point design bites into the material immediately upon contact, allowing for a precise, centered start. This feature is a hallmark of high-quality jobber sets like the HIGHFIRE 29-piece collection.
Which set is best for someone needing a wide variety of sizes?
If you require a broad range of options for diverse projects, the 276-piece titanium twist drill bit set is the most comprehensive choice. It covers sizes from 1/16" up to 1/2" and is suitable for wood, cast iron, aluminum alloy, plastic, and fiberglass. For metal-specific work requiring a wide range, the 29-piece HIGHFIRE or the 99-piece COMOWARE M35 cobalt sets provide extensive sizing options tailored to hardened metal and stainless steel applications.
Bottom line
For users prioritizing professional-grade metalworking performance, the BOSCH CO14B 14-Piece Cobalt Drill Bit Set stands out as a premium choice. Its use of M42 cobalt and a three-flat shank design makes it exceptionally capable for drilling into challenging materials like titanium, stainless steel, and cast iron. While it offers fewer pieces than the COMOWARE 99-piece or HIGHFIRE 29-piece sets, the Bosch set emphasizes material integrity and reliable chuck grip. If your work involves frequent drilling into high-density metals where bit longevity and precision are non-negotiable, the Bosch CO14B provides the most robust and trustworthy performance among the cobalt-based options listed.
Deciding on the right set depends on your specific application and frequency of use. Choose a specialized M35 or M42 cobalt set if your primary tasks involve stainless steel or hardened metals, as these materials demand the heat resistance cobalt provides. If your projects are general-purpose and include softer materials like wood, plastic, and aluminum, a large-volume titanium-coated HSS set offers better value and versatility. Always verify that the shank type matches your drill chuck and that the included size range covers the diameters you use most frequently to ensure your investment serves your workshop needs efficiently.
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