Rather than using crimps to attach your large ball bearing swivel at the terminal end of your wire diver or thumper rod, this knot is easy to use and seems to be much stronger than the crimps.
click on the thumbnail pics below to enlarge
Step 1. double your line to form a loop and pass the doubled line
through the eye of the swivel.
Step 2. pass swivel through the loop and tighten up around eye of
swivel to form a half hitch on the swivel.
Step 3. tie an overhand knot in the main line making sure you have both
the main line and the tag end of the loop tied into the overhand knot.
Step 4. Pull tight and trim tag end.
The half hitch on the eye does all of the work, the overhand knot is simply to make sure the wire line doesn't slip through the half hitch.