This Guitar Pickup Jack Installation Tool makes this tricky task a breeze. A must-have for guitar luthiers!
To use the tool, feed it up through the jack installation hole and out through the sound hole, then secure the jack to the tool and pull back through to bring the jack into its place.
Here's a demonstration video put together by Dave's Guitar Shop:
https://www.youtube.com/watch?v=_Vu0NmU8k5E
Installation Instructions:
Specifications:

Lifetime Warranty
