Cobalt Drill Bit Set, 29Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16"-1/2"

Extremely sharp and well made. Incredible value for the cost of these cobalt bits.

I purchase this set just under a year ago. I have not use these drill bits but a couple of times and 4 have already broken. 10/6/2025 Update. Macxcoip Cobalt Drill Bits set seller reached out address any issues or concerns in my satisfaction with the product I received. They offer a full refund or to issue a new set of Drill bits. In a couple of days, I received the new drill bits in the mail, and I must say that these have changed my mind with the quality of Macxcoip Drill Bits. I guess the original set I received was a fluke in the quality, because the replacement bits issued area awesome and seem to be holding up great. Good company that stands behind their product and customer satisfaction.

Got these to cut through metal. They work, but I did dull one of them already on some hard metal, so I took away one star. Otherwise, it's a really full set ALL sizes, nice to have when you need them.

GREAT PRODUCT

I work with metal daily, so I go through a lot of drillbits. cobalt is great for working with metal but it can be brittle if you don’t know what you’re doing. I read some complaints about people snapping their bits and I have yet to do so, and have been using them for months. For the most part, they stay sharp and cut well as long as you take care of them and use them at the proper speed and pressure. The size of the set provides the sized bits needed so that I can properly drill and tap a hole. The one major problem I have with this set is the rounded shaft. All bits are completely round and if your bit bites in the medal, the drill chuck will spin and strip on the shaft. This will happen often especially with the larger bits. That’s annoying in itself but when makes it really bad is the fact that the drillbit sizes are etched exactly in that area, so you essentially strip off the drillbit size label very easily, and the only way to make sure you have the correct size, is you must stay organized and keep it in its case and its proper spot. For this reason, I highly recommended purchasing the option with the metal case provided. Overall, it’s a great set and I’d likely buy it again based on its price point and quality.