10 Best Quality Drill Bits For Stainless Steel 2025 in the United States

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.

One of the standout features is the thick web-helix design that offers additional stability, allowing for better control and reduced breakage, especially in challenging materials. Additionally, the surface-hardened tip is engineered to penetrate tough and abrasive surfaces effectively.

The assortment includes a wide range of sizes from 1/16" to 1/2", catering to various drilling needs. As these bits are made in China, some users may have preferences regarding origin, but Bosch generally maintains a reputation for quality.

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.

One of the standout attributes of this set is its ability to handle not just stainless steel but also cast iron, copper, aluminum, and even wood, which broadens its usability. The drill bits are also nicely housed in a metal index storage box, making organization and access easy, a thoughtful touch for those who appreciate keeping their tools tidy.

There are a couple of points to consider. While the cobalt material is robust, it can be more brittle than other types of steel, which means extra care is needed to avoid breaking bits when drilling harder materials. Additionally, some users might find that the bits can heat up quickly if not used with proper technique, so it's advisable to use cutting fluid or a slower drilling speed to mitigate this. The product is manufactured in China.

The toolant Cobalt Drill Bit Set is a robust choice for those needing to drill through stainless steel and other metals. Its cobalt steel material provides durability and resistance to wear, making it suitable for heavy-duty tasks. The titanium aluminum nitride (TiAlN) coating enhances surface hardness and heat resistance, which helps the bits stay sharp and cut effectively over time.

This set includes 21 pieces, ranging from 1/16” to 1/2”, covering a variety of drilling needs. The bullet point tip design is sharp and self-centering, which reduces wandering and ensures precise drilling, ideal for precise applications. Additionally, the 3-flat shank design offers better grip and reduces slippage during use, adding to its reliability and ease of use.

For users who need a larger variety of sizes beyond the included 21 pieces, the set might feel limiting. Despite this, the toolant set provides a strong combination of durability, precision, and range suitable for both DIY enthusiasts and professional tradespeople. The inclusion of a 90-day warranty offers peace of mind in case of any issues.