Tools needed...

First, drill out the old threads with appropriate drill bit. In this case it is a 21/64.

Then, blow out scrap metal with compressed air.

Next, use a tap handle and the provided tap to cut new threads.

Put the coil on the insert tool. Note the tang that is used to drive the coil.

Drive the coil into the newly cut threads. Make sure you drive it far enough that no threads are exposed on the outside.
Remember that tang? You will need to remove it.

A well placed blow with a screwdriver will pop it off.

Finished product -good as new!
