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10 Best Metal Drill Bits 2026 in the United States
#1
Winner
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
The BOSCH CO21B 21-Piece Drill Bit Set offers a solid choice for anyone needing reliable metal drilling tools. Made from Cobalt M42 alloy, these bits are designed for tough jobs involving stainless steel, cast iron, titanium, and other metals. The inclusion of 8% cobalt makes them much more durable and heat-resistant than standard bits, meaning they won’t wear out quickly under heavy use or high temperatures. This feature is especially useful if you frequently drill hard metals.
Rating
10.0
Chosen by1,287
Material
Size
Point Angle
Most important from
6832 reviews
#2
Milwaukee 48-89-9224 Step Bit 6-Piece Set (#1, 4, 6, 7, 8, 9)
The Milwaukee 48-89-9224 Step Bit 6-Piece Set offers a solid option for those needing step drill bits primarily for metals like aluminum, brass, copper, and steel, as well as plastics and wood. Made from alloy steel with a black oxide finish, these bits are designed to resist wear and corrosion, enhancing their durability. The black oxide coating also helps reduce friction and heat buildup during drilling, which is beneficial for clean and efficient cuts.
Rating
8.5
Material
Coating
Point Angle
Most important from
143 reviews
#3
Milwaukee 48-89-4680 18-Piece Shockwave Impact Duty Thunderbolt Titanium Drill Bit Set w/Anti-Walking 135 Degree Angled Tip and Storage Case
The Milwaukee 48-89-4680 18-Piece Shockwave Impact Duty Titanium Drill Bit Set is designed for those who require reliable and durable drill bits for heavy-duty tasks. One of its standout features is the titanium coating, which significantly reduces heat buildup during use. This means you can use the bits for extended periods with less risk of warping, making them suitable for various applications. The special parabolic flute design enhances chip clearance, allowing for a quicker and cooler drilling experience, which is a big plus for efficiency.
Top 10 Best Metal Drill Bits 2026 in the United States
#1
Winner
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
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
Material: Cobalt
Size: 21-Piece Drill Bit Set
Point Angle: 135 Degrees
Flute Design: Spiral
Chosen by 1287 this week
Milwaukee 48-89-9224 Step Bit 6-Piece Set (#1, 4, 6, 7, 8, 9)
Milwaukee 48-89-9224 Step Bit 6-Piece Set (#1, 4, 6, 7, 8, 9)
Material: Alloy Steel
Coating: Black Oxide
Size: 6-Piece Set (#1,4,6,7,8,9)
Flute Design: Spiral
Milwaukee 48-89-4680 18-Piece Shockwave Impact Duty Thunderbolt Titanium Drill Bit Set w/Anti-Walking 135 Degree Angled Tip and Storage Case
Milwaukee 48-89-4680 18-Piece Shockwave Impact Duty Thunderbolt Titanium Drill Bit Set w/Anti-Walking 135 Degree Angled Tip and Storage Case
Material: Titanium, Plastic
Coating: Titanium
Size: 1/16” to 3/8”
Flute Design: Parabolic
Milwaukee Electric Tools 48-89-2332 29Pc Cobalt Helix Drill Bit Set, Red
Milwaukee Electric Tools 48-89-2332 29Pc Cobalt Helix Drill Bit Set, Red
Material: Cobalt
Coating: cobalt
Size: 29 pieces
Flute Design: Straight
DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361)
DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361)
Material: Titanium Nitride
Coating: Titanium Nitride
Size: 1/16-inch to 1/2-inch
Point Angle: 135 Degrees
Flute Design: Spiral
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Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16"-3/8", with Plastic Index Storage Case
Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel, 99Pcs M35 High Speed Steel Twist Jobber Metal Drill Bits 1/16"-3/8", with Plastic Index Storage Case
Material: M35 cobalt steel
Coating: Gold oxide
Size: 1/16 to 3/8 inch
Point Angle: 135 degrees
Diablo Metal Demon Drill Bit Set with Thermal Shield Protective Coating for Mild, Hardened and Stainless Steel - 29-Pieces Set - DMD-T29
Diablo Metal Demon Drill Bit Set with Thermal Shield Protective Coating for Mild, Hardened and Stainless Steel - 29-Pieces Set - DMD-T29
Material: Blend
Coating: Thermal Shield Coating
Size: One Size
Point Angle: 130°
Flute Design: Spiral
DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal (DWA1184)
Material: High Speed Steel
Coating: black and gold
Size: 14 piece set
Point Angle: 135 Degrees
Flute Design: Spiral
DEWALT Drill Bit Set, 21-Piece, 135 Degree Split Point, 31 Degree Helix, Black Oxide Coated, For Plastic, Wood and Metal (DWA1181)
DEWALT Drill Bit Set, 21-Piece, 135 Degree Split Point, 31 Degree Helix, Black Oxide Coated, For Plastic, Wood and Metal (DWA1181)
Material: Blend
Coating: Black oxide
Size: 8.75 x 1.38 x 8.75 in
Point Angle: 135 Degrees
Flute Design: Parabolic
#10
Milwaukee 48-89-9221 3 Piece Step Drill Bit Set
Milwaukee 48-89-9221 3 Piece Step Drill Bit Set
Material: High Speed Steel
Coating: Black Oxide
Size: 2 x 8 x 9 inches
Flute Design: Spiral
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Buying Guide for the Best Metal Drill Bits
Choosing the right metal drill bit can make a significant difference in the quality and efficiency of your drilling projects. Metal drill bits are specifically designed to cut through metal surfaces, and selecting the right one involves understanding various specifications and how they align with your needs. Here are the key specifications to consider when picking metal drill bits and how to navigate them.MaterialThe material of the drill bit is crucial because it determines the bit's durability and effectiveness in cutting through metal. Common materials include high-speed steel (HSS), cobalt, and carbide. HSS bits are suitable for general-purpose drilling and are more affordable. Cobalt bits are more durable and can handle harder metals, making them ideal for tougher jobs. Carbide bits are the hardest and most durable, perfect for heavy-duty and high-precision tasks. Choose HSS for light to moderate tasks, cobalt for tougher metals, and carbide for the most demanding applications.
CoatingCoatings on drill bits enhance their performance and longevity. Common coatings include black oxide, titanium, and diamond. Black oxide increases the bit's resistance to rust and wear, making it suitable for general use. Titanium coatings reduce friction and heat buildup, extending the bit's life and making it ideal for frequent use. Diamond coatings are the hardest and provide superior cutting performance, especially for very hard metals. For occasional use, black oxide is sufficient. For frequent drilling, titanium is a good choice, and for the hardest metals, diamond-coated bits are the best.
SizeThe size of the drill bit, including its diameter and length, determines the size of the hole you can drill and the depth you can reach. Drill bits come in various diameters, typically measured in millimeters or inches. Smaller diameters are suitable for precision work and smaller holes, while larger diameters are used for bigger holes. The length of the bit affects how deep you can drill. Choose the size based on the specific requirements of your project, ensuring the diameter matches the hole size you need and the length is sufficient for the depth you want to achieve.
Point AngleThe point angle of a drill bit affects how it cuts into the metal. Common point angles are 118 degrees and 135 degrees. A 118-degree point angle is standard and works well for softer metals, providing a good balance between cutting speed and control. A 135-degree point angle is flatter and more suitable for harder metals, offering better precision and reducing the risk of the bit wandering. For general-purpose drilling, a 118-degree angle is usually sufficient. For harder metals or more precise work, opt for a 135-degree angle.
Flute DesignThe flute design of a drill bit refers to the grooves that spiral up the bit, helping to remove chips and debris from the hole. Standard flutes are suitable for most drilling tasks, providing a good balance of chip removal and strength. Parabolic flutes are deeper and more efficient at removing chips, making them ideal for deeper holes and softer metals. For general use, standard flutes are adequate. If you are drilling deeper holes or working with softer metals, consider bits with parabolic flutes for better performance.