Best Cobalt Drill Bit Sets: Drill Through Hard Metals Faster

If you’re looking for a set of bits that can make your next auto repair project easier, consider adding the Irwin 29-piece Drill Bit Set, M35 Cobalt Steel to your tool kit. Featuring a spiral flute, these precisely-machined bits give you accurate and powerful results. Made out of cobalt-fortified steel materials, these drill bits are capable of withstanding a fair amount of heat. In fact, the metal includes a full five percent of cobalt, bracing the tools to retain their structural integrity despite abrasion and temperature. Ranging in size from 1/16 inch to 1/2 inch, this set comes with all the bits you are most likely to need. With a 135-degree split, they avoid travel during the drilling process, making work both easier and more efficient overall. 

It’s worth noting that since the incremental increases are only 1/64-inches, there can be some issues with the sizing of the individual bits. Some may be nominally smaller than suggested, giving you the risk of increasing walk and compromising the force exerted.

Want a set of high-grade drill bits that won’t lead to you going over budget? Take a look at the Bosch Cobalt M42 Drill Bit Set for its reasonable price point and quality construction. The drill bits themself feature a spiral flute and a three-flat shank type. Compatible with most repair projects, the set comes with 21 pieces. By incorporating a substantial amount of cobalt (eight percent), these steel-alloy drill bits are very powerful. The addition of extra cobalt enhances the sturdiness of the bits themselves, helping the parts prevent wear due to friction during use. They use a web-helix design to facilitate stability during work. It prevents the risk of walking and makes it easier to focus the energy of the drill itself. Effective at handling everything from titanium to iron, these affordable bits are a great way addition to any tool kit. 

Keep in mind that, while the individual bits are well sized, the case can be a bit tricky to read. However, once you’re familiar with the drill bit set, the markings aren’t as necessary and this is no longer a concern. 

If you're planning to tackle a maintenance project and need a set of bits that can keep up with the demand, check out the DeWalt 14-Piece Cobalt Pilot Point Drill Bit Set. It has a great balance between strength and function. The bits range in size from 1/16-inch to 3/8-inch, which makes the set ideal for all types of projects. All of the pieces come encased in a strong polymer container that makes it easy to store the bits and keep them organized. The ABS material won’t crack nor will it let moisture get close to the bits, preventing the risk of rust and corrosion. Made of cobalt-heavy steel, these precisely constructed bits use a spiral flute to give efficient results. Ideal for compact storage and versatile performance, this bit set is a truly worthy candidate.

Even though the tough construction of the bits is really desirable, they are fairly heavy. Keep this in mind when handling the drill at first to avoid any issues with the bits traveling while you’re using the drill. 

If your garage is overflowing with tools and you want a set of bits that will work well and not take up a ton of space, try the Drill America 29-piece Cobalt Drill Bit Set. It has a unique storage mechanism and sturdy design. Despite coming complete with a large supply of drill bits, ranging from 1/16 inch to 1/2-inch, the set fits just about anywhere. It comes in a round container with individual slots (each clearly marked) for the different bits. The parts themselves feature a spiral flute and a 135-degree point. Split for efficient penetration of hard metals, these bits operate powerfully and precisely. Since the pieces increase in size by 1/64-inches, it’s no issue finding compatible parts. Complete with gold plating, these cobalt-heavy drill bits are able to retain their strength at high speeds, making them ideal for automotive work. 

Keep in mind that, while the bits are sturdy, the case can’t hold up to the same standards. If it falls, the case is likely to get cracked, so keep this in mind when choosing where to store your new bit set. 

If you're focused on finding a set of tools that will work over the long term, the Stroton Store Metric Cobalt Drill Bits live up to even the most demanding standards. Made out of cobalt-heavy steel, the metal includes eight percent of this powerful element, ensuring full structural integrity. Falling between 68 and 70 on the Rockwell Hardness Scale, these bits aren’t prone to chipping. They also won’t lose the effectiveness of the split point tip due to ongoing use. Designed to quickly slice through all types of metals including galvanized steel, these bits are ideally suited to automotive work. The bits aren’t prone to travel during work, letting you focus on precision tasks with more ease. Coming with 19 pieces, these bits range in size from 3/64-inch to 1/2-inch bits, this set is complete with a bit for any project you may need to tackle. 

One downside is that the markings are in metric, so if you aren’t familiar with that system, it may require an extra step to convert the digits. In terms of construction quality, however, these bits definitely earn this honorable mention.