These bits are great for use with a Dremel tool that attaches to the Workstation 220 Mini Press but probably don't have much practical use for anything else. Reduced 1/8" shank means they fit easily in a standard Dremel mini-chuck; bits shorter fitting limited limited to 2" max. Press the 220 transition and the pointed cutting tips help with fine centering/accuracy of your holes, despite the somewhat "squirrel" nature of the 220 press. Don't get me wrong, I really like the Dremel mini press. It's just not to be confused with a "real" drill press. Its limitations are no more and no less than that of the Dremel tool itself. Dremel's direct warning that hand drilling with a 1/4" bit is "not recommended" should tell you everything you need to know about these bits. Take the time to you need, align carefully, don't drill into too hard materials (e.g. metal, very dense hardwoods) and don't put too much pressure on the cut, let the drill bit do its job and you should with your results SEH R be satisfied.