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10 Best Quality Drill Bits For Stainless Steel 2025 in the United States
#1
Winner
BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
The BOSCH CO14B 14-Piece Assorted Set is designed specifically for drilling in tough materials like stainless steel, cast iron, and titanium, making it a solid choice for professionals and DIY enthusiasts alike. The drill bits are made from Cobalt M42 material, which is known for its durability and resistance to high heat, ensuring they can handle demanding tasks without losing effectiveness. The inclusion of a 3-flat shank design enhances grip in the chuck, preventing slippage during use, which is particularly important for precision work.
Rating
9.9
Chosen by1,322
Material
Most important from
6547 reviews
#2
MACXCOIP Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"
The MACXCOIP Cobalt Drill Bit Set is designed to cater to various drilling needs, especially when working with stainless steel and other hard materials. With 29 different sizes ranging from 1/16" to 1/2", it offers great versatility, making it a solid choice for both professionals and DIY enthusiasts. The M35 cobalt construction enhances durability and sharpness, allowing users to make precise cuts without excessive wear and tear. The 135-degree point tip and twist design are excellent features, as they improve cutting efficiency and reduce the chances of the bit walking off during use.
Rating
9.8
Material
Size and Set
Most important from
1852 reviews
#3
HIDOTOL Cobalt Drill Bit Set 115 PCS - M35 High Speed Steel Twist Jobber Length Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, Plastic and Wood, 1/16"-1/2", A-Z, 1-60
The HIDOTOL Cobalt Drill Bit Set is designed to handle tough materials like stainless steel effectively. Made from M35 high-speed steel with 5% cobalt, these bits last longer and stay sharper when drilling hard metals compared to regular bits. The 135° split point tip helps start the hole precisely without slipping, which means cleaner and faster drilling. Its round shank is standard and fits most drill chucks easily. A titanium aluminum nitride coating adds extra durability and helps keep the drill bit cooler by reducing friction, so it performs better over time.
Rating
9.7
Material
Size and Set
Most important from
700 reviews
Top 10 Best Quality Drill Bits For Stainless Steel 2025 in the United States
#1
Winner
BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
Material: Cobalt M42
Coating: Titanium
Tip Design: Surface-hardened tip
Size and Set: 14-Piece Assorted Set, 1/16" to 1/2"
Shank Design: 3-flat shank design
Chosen by 1322 this week
MACXCOIP Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"
MACXCOIP Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"
Material: Cobalt
Tip Design: 135-degree point tip, twist design
Size and Set: 29 sizes from 1/16" to 1/2"
Shank Design: Round
HIDOTOL Cobalt Drill Bit Set 115 PCS - M35 High Speed Steel Twist Jobber Length Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, Plastic and Wood, 1/16"-1/2", A-Z, 1-60
HIDOTOL Cobalt Drill Bit Set 115 PCS - M35 High Speed Steel Twist Jobber Length Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, Plastic and Wood, 1/16"-1/2", A-Z, 1-60
Material: M35 steel with 5% cobalt
Coating: Titanium Aluminum Nitride
Tip Design: 135° split point
Size and Set: 115 pieces, sizes 1/16 to 0.5 inch
Shank Design: Round
GMTOOLS 29Pcs Cobalt Drill Bits Set, M35 High Speed Steel, 135 Degree Tip, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-1/2"
GMTOOLS 29Pcs Cobalt Drill Bits Set, M35 High Speed Steel, 135 Degree Tip, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-1/2"
Material: Cobalt Steel
Coating: Titanium
Tip Design: 135-degree split point
Size and Set: 1/16 to 1/2 inch, 29Pcs
Shank Design: Straight
Related Products
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
Tip Design: 135-degree split-point
Size and Set: 21-piece set
Shank Design: Straight
Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
Material: Cobalt
Coating: Hardened
Tip Design: 135-degree split point
Size and Set: 19 pieces, 1-10mm (0.5mm increments)
Shank Design: Straight
GMTOOLS 29Pcs Cobalt Drill Bit Set, 135 Degree Tip High Speed Steel with Black and Gold Finish, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-1/2"
GMTOOLS 29Pcs Cobalt Drill Bit Set, 135 Degree Tip High Speed Steel with Black and Gold Finish, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-1/2"
Material: High Speed Steel, Cobalt
Coating: Black and gold oxide
Tip Design: 135-degree split point
Size and Set: 29-piece, sizes 1/16 to 1/2 inch
Shank Design: Straight
HIDOTOL Cobalt Drill Bit Set 29 PCS - M35 High Speed Steel Twist Jobber Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, Plastic and Wood with Indexed Round Case,1/16"-1/2" by 1/64" THS.
HIDOTOL Cobalt Drill Bit Set 29 PCS - M35 High Speed Steel Twist Jobber Drill Bits for Hardened Metal, Stainless Steel, Cast Iron, Plastic and Wood with Indexed Round Case,1/16"-1/2" by 1/64" THS.
Material: High Speed Steel with Cobalt
Coating: Gold Oxide
Tip Design: 135° split point
Size and Set: 29 bits from 1/16
Shank Design: Round
#10
toolant Cobalt Drill Bit Set for Metal and Steel (Pro), Titanium Aluminum Nitride Coated (TiAlN) with Bullet Point Tip, for Hardened Metal, Stainless Steel, 21pcs 1/16"-1/2"
toolant Cobalt Drill Bit Set for Metal and Steel (Pro), Titanium Aluminum Nitride Coated (TiAlN) with Bullet Point Tip, for Hardened Metal, Stainless Steel, 21pcs 1/16"-1/2"
Material: Cobalt Steel
Coating: Titanium Aluminum Nitride
Tip Design: Bullet point
Size and Set: 21 pieces, 1/16” to 1/2”
Shank Design: 3-flat
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Buying Guide for the Best Quality Drill Bits For Stainless Steel
Choosing the right drill bits for stainless steel is crucial to ensure efficient and precise drilling. Stainless steel is a tough material, and using the wrong drill bit can lead to poor performance, damage to the material, or even injury. To make the best choice, you need to understand the key specifications that determine the quality and suitability of drill bits for stainless steel. Here are the essential specs to consider and how to navigate them.MaterialThe material of the drill bit is fundamental because it determines the bit's hardness and durability. For stainless steel, high-speed steel (HSS) is a common choice, but cobalt steel and carbide-tipped bits are even better. HSS is suitable for general use, cobalt steel offers better heat resistance and durability, and carbide-tipped bits are the most durable and can handle the toughest jobs. Choose HSS for occasional use, cobalt for frequent use, and carbide for heavy-duty, professional applications.
CoatingCoatings on drill bits reduce friction and increase the lifespan of the bit. Common coatings include black oxide, titanium, and diamond. Black oxide is good for general use and provides some corrosion resistance. Titanium coatings reduce friction and heat buildup, making them suitable for more demanding tasks. Diamond coatings are the most durable and are ideal for the toughest materials. For stainless steel, titanium or diamond coatings are recommended for their superior performance and longevity.
Tip DesignThe design of the drill bit tip affects how easily it can penetrate stainless steel. Split-point tips are excellent because they start drilling on contact and reduce walking, making them ideal for precise work. Standard chisel tips are less effective on hard materials like stainless steel. For the best results, look for drill bits with a split-point or a 135-degree angle tip, as these designs provide better control and efficiency.
Size and SetDrill bits come in various sizes, and sets can include a range of sizes. The size you need depends on the specific holes you need to drill. If you frequently work with different sizes, a set with a wide range of bits is useful. For occasional use, you might only need a few specific sizes. Consider the projects you plan to undertake and choose a set that covers those needs without unnecessary extras.
Shank DesignThe shank is the part of the drill bit that fits into the drill. Common designs include round, hex, and reduced shank. Hex shanks provide a better grip and are less likely to slip in the drill chuck, making them ideal for high-torque applications. Reduced shank bits allow for larger diameter bits to be used in standard drill chucks. Choose a shank design that matches your drill and the type of work you do. Hex shanks are generally a good choice for stainless steel.