Best Metal Core Drill Bits of 2026

The BOSCH Impact Tough Bit is an effective tool for drilling through various materials. Its no skate tip ensures accurate starts, while its long flutes allow for efficient material removal. The impact-rated shank provides higher torque for drill/drivers, making it a versatile option for any job. Additionally, the black oxide coating reduces friction, extending the bit's lifespan. Lastly, the laser marking feature clearly identifies the bit's diameter, making it easy to locate the right size. With these features, the BOSCH Impact Tough Bit is a reliable and efficient choice for any drilling task.

The Sworker Diamond Drill Bits offer a set of durable tools designed for precise and efficient drilling and grinding. With premium diamond-coated tips, you can easily work through tough materials like glass, stone, and ceramic, making your projects smoother and faster. The bits fit perfectly with Dremel rotary tools, giving you great control for detailed tasks like jewelry making and craft work. Available in three small sizes—1mm, 2mm, and 3mm—the set is ideal for delicate jobs, such as enlarging holes or engraving. To keep the bits lasting longer and prevent overheating, it’s best to use them with water as a cooling aid.

Introducing the YUANYUU Diamond Chamfer Bits, the perfect tool for enlarging, shaping, and trimming existing holes in ceramics, hard ceramics, granite, and marble. This set includes two different shaped diamond router bits with a threaded adapter, allowing you to easily polish the hole. With the diamond cone grinder bit and diamond milling drill bit, you can create holes of different sizes without the need for multiple core drills, saving you time and effort. Made of high-quality diamond and sturdy metal materials, these chamfer bits ensure safety, reliability, and high hardness for effective cleaning and trimming, resulting in smooth and beautiful hole finishes. Whether you need to enlarge a hole or create circular indentations for pipes or wires, the YUANYUU Diamond Chamfer Bits have got you covered.

The Malco Cutter Bits offer great versatility for various metalworking tasks, making them a handy choice for your projects. They are designed to last longer than many other bits, so you won’t need to replace them as often, saving you time and money. Their precision-fit sealed bearings ensure smooth operation, reducing wear and tear and helping you work with more control. Plus, the easy-to-adjust pivot pin lets you quickly fine-tune the bit’s position, so you can keep it cutting efficiently without hassle. These features combine to provide a reliable and user-friendly cutting experience.

The OFNMY Diamond Drill Set offers a durable solution for your drilling needs with its high-quality alloy construction, which resists wear and breakage, making it ideal for tough materials like concrete and brick. Its diamond-coated bits provide a smooth grinding action that helps prevent cracks and chips when working on delicate surfaces such as tiles and glass. With multiple sizes included, you can easily pick the right bit for small screws or larger holes, adapting to various projects. Plus, this set works well on many materials, including metal, wood, and plastic, so you won’t need different sets for different jobs, saving you time and effort.

The Geuoaoa Diamond Drill Bits set includes seven pieces in various sizes, giving you the flexibility to drill holes of different diameters with ease. This set is perfect for working on tiles, porcelain, glass, marble, and other hard materials, making it a versatile tool for your home projects. The bits use advanced vacuum brazed diamond particles, which help you drill precise and clean holes while reducing the chance of cracks or chips. Plus, the dry-drilling design with a wax core keeps the drill bits cool and lubricated, so they last longer and work efficiently. You’ll also appreciate the handy storage case that keeps everything organized and easy to find.

The IMeanTop Diamond Bit Set is designed to help you ream, trim, polish, clean, and smooth rough edges on existing holes in materials like tile, marble, granite, glass, and wood. Its 2-inch diamond beveling chamfer bit lets you work on holes up to 2 inches wide, making it easy to customize the size you need. The 1-inch diamond finger milling bit is perfect for shaping and detailed work. Plus, the set includes a 5/8-11 thread adapter, so you can use these bits with many regular drills and angle grinders, giving you flexibility and convenience for your projects.