Hyper Tough 12-Step Split Point Titanium Coated Drill Bit, 3/16 - 7/8-inch, Model 42536

from Abraham

If you need a specifically sized hole, this is the drill bit you need. Works well on plastic and metal, not so well on wood. Also, as a size note, you will need to drill a pilot hote with a regular drill bit, because this one won't be able to make that intial penetration of the material on its own.

from PeoplePhobic

I used this to drill some holes in plastic and metal. You're going to want to oil if you're going into metal but it is capable of doing it. The price is great. Similar step bits can cost up to 10x as much. I only drilled through some 1/4" steel a couple of times but it held up. I used cutting oil...

from Blaine

Self tapping tip, easy to drill out holes in a variety of sizes.

from 404NtFnd

i needed a reamer to enlarge bolt holes in some aluminium. stuck this in my electric drill and with some patience and persistence was able to complete the task

from HyperrS

Made out of good material and doesn't create a lot of drag on my drill. I think this is a quality bit for people who are beginners of even experts. It does the job without any hassle. I would recommend.