Just a weekend warrior working on a landscape project. Building a footbridge from two 12" Ibeam and 2x8 steel beams. Drill 2 holes on each end every 6" to attach the wood deck. As an experiment I bought Bosch, Dewalt and these bits. I was surprised that one of these bits did half the job. The other half burned the other "famous brands" bits listed and I used one of those to finish. I'm impressed. Very important.