Cobolt drill bit

To choose the right COBALT drill bit, base your decision on the material you’re drilling and the required resistance. In our assortment, HSS cobalt drill bits offer increased durability and better heat tolerance than standard HSS bits, making them ideal for metals such as steel. You’ll find options like 3 mm HSS cobalt bits for small holes, and Spanish 5% cobalt IZAR bits in 13 mm and 15 mm for heavier-duty use. For versatility, consider a set that combines twist bits and masonry bits (for example the Ingco 16-piece set with 2–6 mm and 4–8 mm), or a more complete assortment that includes different types and sizes.

The most complex attribute is the mix of material/cobalt coefficient in the bit and how that relates to your intended use. Spanish IZAR bits with 5% cobalt provide better durability when drilling harder metals and resist wear better than standard bits. In comparison, a general HSS cobalt bit also offers strong resistance, but the best choice depends on the target diameter and material. For varied projects, choose sets that combine wood/metal bits and masonry bits (for example Ingco sets and Black+Decker kits) so you can handle multiple tasks without switching tools.

An occasional DIYer will usually prefer versatile sets that cover wood, light metal, and a few masonry applications—for example, a kit with 2–6 mm twist bits and a few masonry bits in the 4–8 mm range. This lets you handle common repairs without buying many individual pieces. A professional or workshop will need a wider selection, such as a 109-piece set that includes concrete drill bits (3–10 mm), various attachments, and accessories—so they can tackle many tasks and materials quickly without interrupting work.

Maintaining drill bits means keeping them clean, dry, and stored in a suitable case to prevent accidents and cross-material wear. Make sure the bit diameter matches your tool’s chuck, and adjust speed and pressure while drilling to avoid overheating. For example, a robust tool with a chuck up to 13 mm will require appropriate bits and correct settings—choose bits designed for metals and construction materials when working across different surfaces.

For simple, occasional projects, a small versatile set is enough—such as one that combines twist bits and masonry bits (2–6 mm and 4–8 mm). For varied and repeated projects, a more complete kit is better. For example, a 109-piece set may include 5 concrete bits (3, 5, 6, 8, and 10 mm), 54 attachments, and other useful accessories, allowing you to handle many tasks without changing tools.

These brands bring useful specializations: IZAR offers Spanish cobalt options that improve longevity on metals; INGCO provides well-stocked, versatile sets for various jobs; Bosch contributes with robust, reliable tools for heavy use; and Black+Decker rounds out the range with extended sets suitable for light home and light professional use. By choosing based on the type of work—metal, wood, or masonry—and based on the bit size, you maximize both durability and the efficiency of your projects.