Bruce Barnett wrote:
one thing to be aware of with the cheapo ones is that
they can't cut well unless you have a starter hole in the middle.

The good ones can cut without a center support.


In my experience with the HF set, they cut fine without a center hole
(using a drill press). Maybe I just got lucky and have a particularly
good cheap set, but I've never needed a pilot hole when using them in
my drill press.
YMMV
Andy