Favorite Locksmith Jig for Installing Deadbolts | Penetration Expert Blog
For further info go to http://penetrationexpert.com/
A1’s Bulls Eye Installation Tool was designed specifically for locksmiths. The Bulls Eye Installation Tool includes a toggling backset adjustment and self centering alignment guide which allows users to easily install and drill a door for deadbolts and locksets. I highly recommend this tool and I have been using it daily for 15+ years.