I necessitate a drill bit that will drill a hole 4-5" dia. and roughly 6 to twelve inches thoughtful.? Does anyone have any impression were I could find a drill bit...

Does anyone have any impression were I could find a drill bit that will cut a hole 4-5" Dia. and going on for 6-12 inches deep? I hold been trying to find something but haven't have any luck. A hole saw wont go low enough. Any suggestions?
Where can i buy some nice rubbers from?
Answers:    Get a forstner bit to drill it...Here is a site that sell them up to 4 1/2 inches wide.....The local hardware stoeres should pass them
What is the best method for resurfacing a...
Go to a rental store, they have industrial equipment that can do this, btw, wood? metal? stone?