OK -- now I'm making progress!
It's amazing what some quality drill bits will do......
Razzler wrote:If you can get cutting oil it works allot better then penetrating oil, I don't now why it does but it makes a BIG difference.
jpen1 wrote:get milwakee bimetal ice hardened hole saws they are the best
Thanks for the tips, guys!
I'm the most impatient person on the planet -- so I don't want to drive any farther than the local hardware store (limited selection) because I'll get severe road-rage
, & I can't wait for an order -- it'll take too long. I'll definitely buy some cutting oil for the next job, whatever that may be & keep the Milwaukee saws in mind -- I used to use their sawzall & blades when I did industrial roofing over a decade ago. Stuff was tough as nails. I could cut through corrugated decking for hours on the same blade! And the sawsall took more than a few flights off the roof after so many bad days.
Still had the same one for over 4 years.
I only have 1 more to do, so I gotta dance with what brung me.