[quote=monocoqueKeep me posted about the dremel researches. I don't remember seeing those style discs at HD or Lowes. Not a very wide range of attachments in either place. Are you ordering on-line?
What is the metal plate in your photo? Is that u-channel? We're talking about floor screws, yes?[/quote]
I own an Ace Hardware store and so I ordered the attacment from them. You can order from them online
Ace and they will deliver them freight free to your local Ace store.
The metal plate is actually the backside of a piece of inner skin that was placed around my water heater.
And yes, I am using this drill method to remove the elevator bolts (screws?) that hold my plywood floor to the frame. I use the Dremel tool in the c-channel bolt and screws.