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Review on Durable Bi Metal Drilling Aluminum Stainless by Jermaine Munajj

Revainrating 4 out of 5

Works well in hole saws

But if you plan to use it in reverse to drill holes in drywall for recessed lighting - no. The mandrel simply unscrews from the saw cup. It is better to buy a solid hole saw. Or use "steel" epoxy on the threads.

Pros
  • Use
Cons
  • Ugly packaging