If you're wondering why you need a set of drills and taps when you already have drills and several taps, watch a video that explains how to use them used. They won't change your outlook on life, but they will make one thing easier. I expected to have to loosen the drill bit after making a hole in the metal, but that didn't happen. The bit went through, the hammer clicked, and then I had a threaded hole. This was done with a hand drill. I didn't have a drill handy to see how well it worked. If you're wondering if this set of faucets is for you, read on. As a drill, this set is not as good as my expensive sets. They work well with aluminum but take a while to get through medium steel and I don't think they can handle hardened steel. I haven't used any of the beats often enough to know how long they last; easily, not so long. However, this set is cheaper than the premium bit set and includes taps. If you don't need a lot of threaded holes and the sizes provided here are good enough for you, I think this is a good buy.
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