This rotary drill bit is the perfect addition to any cutting tools arsenal .Through trial and error, i found that it effortlessly made small precision holes in aluminum with ease. Its keyless design makes it quick and easy to use and its micro size allows for intricate work, making it an excellent choice for Industrial and Scientific applications. The only downside I found was that it struggled a bit with tougher materials, so keep that in mind when choosing the right bit for the job. Overall, a great purchase!