On Fri, 08 Apr 2016 13:44:01 +0000, Tammy Longest
wrote:

Delta faucet set screw won't budge, so hubby drilled out set screw placed tap
out and used pliers to turn it when that broke off in the hole. Now what
should we do to get that out and the set screw.

Contact Delta and get a free replacement. They are guaranteed for
life. Don't tell them about the drilling, just the problem that had
you working on it in the first place.