Efficient Universal Drilling Tool,Multi-Function Triangle Cross Alloy Drill Bit Tip Tools,Titanium Combination Drill Tap Bits Set,Metal, Wood (Black)

Have not tried it on anything but wood so far (going to try them on some plexiglass when I get to it) but I can say that it's a nice looking set, appears to be made to professional standards, and doesn't cost an arm and a leg. As for durability, time constraints regarding the review process prevent any long-term testing and evaluation, so that's something that only time and use will tell, and I will update if any significant shortcomings are encountered. As for now...For what it is, what it does, and what it costs: Five StarsI am the Totally Unbiased Reviewer Dude (T.U.R.D.) and that is how I see it.

These fit perfectly in my Ryobi. They drill pretty well. After drilling some aluminum I didn't see any damage on the bit. They are not very sharp, but seem to work fine.