This step drill bit set is hard to beat. We've had no problems at all with any of these. They drill through pretty much anything, and they stand up to pressure. I don't use them as much as my boys but son 1 has even used them at work and the guys on his crew have asked about where he got them, so even they were impressed. We've had a couple of high end sets, and I'd have to say that these stand up to any we've tried. I'd recommend them.
Rating:
[5 of 5 Stars!]