10 Best Drill Bit Sets 2025 in the United States

The BOSCH CO21B 21-piece drill bit set is designed mainly for metal drilling tasks, especially tough materials like stainless steel, cast iron, titanium, and aluminum. These bits are made from cobalt M42 alloy, which includes 8% cobalt, making them very durable and resistant to heat — this means they can last up to 10 times longer than standard bits and handle long drilling sessions without losing effectiveness. The set covers a good range of sizes from very small (1/16 inch) to larger holes (up to 1/2 inch), making it versatile for various projects.

One handy feature is the three-flat shank on bits 3/16 inch and larger, which helps the drill grip the bit better and avoid slipping. Similarly, the split point tips on bits 1/8 inch and bigger make starting holes easier with less chance of the bit skating around on the metal surface. The bits also have a 135-degree cutting angle and a hardened tip, which helps them penetrate tough materials more smoothly.

The bits come in a plastic case for organized storage and easy transport. Because these are cobalt bits designed for harder metals, they might be more than necessary or costlier if you're only drilling wood or softer materials. Also, while very durable, cobalt bits can be more brittle compared to some other types, so careful use is advised to avoid breaking. This Bosch set stands out as a strong choice for anyone who frequently drills metal and needs reliable, long-lasting bits that resist heat and wear. Its size variety and thoughtful design features make it user-friendly for both professionals and serious DIYers working with challenging materials.

The BOSCH CO14B 14-Piece Assorted Set is a solid choice for anyone looking to tackle a range of drilling projects, particularly in tougher materials like stainless steel, cast iron, and titanium. One of the standout features is the M42 cobalt construction, which offers enhanced durability and heat resistance, making these bits last significantly longer than standard options. The inclusion of a three-flat shank design helps to prevent slipping, which is especially useful when drilling into hard surfaces. With sizes ranging from 1/16" to 1/2", this set caters to various drilling needs, allowing for versatility in both home and professional environments.

The cobalt material and titanium finish provide excellent performance, but they may not be necessary for casual DIY users who primarily work with softer materials like wood or plastic. For these users, investing in a more basic set might be more cost-effective. Additionally, some users may find the bits to be more expensive compared to other standard drill sets, which could be a consideration for budget-conscious buyers.

The BOSCH CO14B set excels in demanding applications and is ideal for professionals or serious hobbyists who need reliable drill bits for challenging tasks. Those with only light drilling needs may not fully utilize the advantages these bits offer.

The DEWALT Drill Bit Set (DWA1184) is a 14-piece collection that offers significant versatility for tackling various materials including plastic, wood, and metal. One of its standout features is the 135-degree split point design, which helps prevent the bits from wandering off during drilling, making it user-friendly, especially for those who might not have the steadiest hands. The high-speed steel construction is a strong point as it ensures the bits are durable and can withstand heavy use, which is crucial for both DIY enthusiasts and professionals. The black and gold coating not only gives the bits a sleek appearance but also protects them from rust and wear, extending their lifespan. Additionally, the tapered web design reduces the chances of breakage, enhancing the set's reliability.

While the set is well-suited for a variety of materials, it may not be the best choice for very specialized applications, such as masonry or applications requiring particularly hard or abrasive materials. Some users have noted that the bits could be better suited for larger drilling tasks, as their size range might limit their effectiveness in more precise or delicate work. Despite the size markings on the shank for quick identification, a beginner might still find it a bit confusing when selecting the right size without some guidance.

This DEWALT drill bit set is ideal for those looking for a reliable and versatile option for general drilling tasks, making it a great choice for homeowners and casual DIYers. However, professionals or those requiring more specialized drill bits may want to consider additional options tailored to specific needs.