Being a little "old school" I always considered Unibits to be a junky idea designed to sell bits rather than make holes...until I used em. They are WAAAAAY easier to use on site to open up a hole than to drill out with a monster drill while trying to apply enough pressure that you actually dig a chip. These flew through the material with almost no pressure (1/2" dia. 1/4" thick), leaving a smooth hole. I'm sold.
My question is, can these (or similar) bits be had for making through holes in specific sizes? The actual unibits are designed for fairly thin sheet and have steps so you can't bore material greater than about
1/8" thick without hitting the next step (coming from both sides is not an option)---or being lucky enough to have a hole the same size as the maximum step. It would be nice to be have a bit that could do 13/16" holes in 3/8" material...along with some other sizes that don't match the maximum step on the unibits (all starting from a 1/4" or so pilot).
I don't see anything like this in the MSC catalog. The closest that I see there is a tapered bit that looks more like a bung reamer. Know of anything that works as well for site work in this kind of application? Sources?
Thanks for all the help
Koz