Dremel 628-01 7 Piece Drill Bit Set

I bought these back in 2020, it's 2023 and they are still going. Great product and amazing quality. Haven't even rusted or broke. I fully recommend!🥰

excellent product

For general-purpose usage, these are excellent bits. I initially purchased this set a few years ago when it had a different packaging and case for my own old Dremel. Having had good experiences with them, I purchased another set of these for my girlfriend to go along with the Dremel 4000 I got for her.These bits are made from high-speed steel, and a good choice for general use. High-speed steel is a highly wear-resistant steel with good strength and reasonably good heat resistance. With good performance for a reasonable price, it's a great material for higher-speed applications such as usage with a rotary tool. For general usage with materials such as wood, plastics, composites, aluminum, and mild/thin steel, these are great. They have a fast start and they do a good job resisting slipping. They hold up well but aren't terribly expensive if you happen to break them (or would prefer to replace them instead of sharpening.) They work well with the Dremel, but also work well with other drills with a chuck design that allows smaller bits. I agree with others that when using these with a standard drill, prolonging the life of these bits means using the fastest RPM setting and to let the speed do the work.My only complaint is that these are more on the rust-prone side than bits of other materials. However, that's expected of most HS steel and an occasional coating of any good rust preventive (I use Corrosion X) and this is a non-issue. I just wanted to note it as a heads-up given it is very easy to prevent rust, but much more of a pain to remove once the rust has already occurred.Beyond occasional usage on mild steel that is thin, I would not advise using these to drill steel because this will accelerate bit wear and may generate so much heat that the bits themselves become damaged. For this usage, I recommend using drill bits made of cobalt steel, as they are designed specifically for drilling hard metals.So overall, this is a great little set. It's versatile, it's affordable, and it's well-made.

Works well.

Very pleased with these. Great price too for Dremel product!