10 Best Drill Bit Sets 2025 in the United States

The Milwaukee 48-89-4680 18-Piece Shockwave Impact Duty Thunderbolt Titanium Drill Bit Set is designed for those who frequently engage in heavy-duty drilling tasks. One of its standout features is the titanium coating, which helps reduce heat and minimizes warping during rapid use, making it safer for extended applications. The unique Shockwave geometry is engineered to withstand high torque applications, ensuring durability and longevity for demanding jobs. Additionally, the parabolic flute design aids in chip clearing, which can enhance drilling speed and efficiency by reducing friction and heat buildup.

This set includes a wide variety of bit sizes, making it versatile enough for many different projects, from small to larger-scale tasks. The robust plastic storage case is also a significant plus, featuring a slide lock system that keeps bits secure and organized, whether you're transporting them or storing them in your tool kit.

While the titanium coating is beneficial, it may not be as effective against wear as some premium materials over extensive use. Users looking for specific specialty bits might find that this set, while comprehensive, doesn't cover every possible need. Moreover, for those new to drilling, the variety of sizes may be overwhelming if you’re unsure which bits to choose for certain tasks.

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 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.