I use a choker (one with the claws that dig in when yanked)
I have a standard choke chain too and ithad limited effect. My wife took here to a puppy class here and the dog trainer said...here, you need this because the choker wasn't doing it. For my previous dog, the choker was all she needed. Actually I do like this claw chain better, it sounds mean but I think its more effective, releases better and puts less stress on her neck and she is now pretty good (not perfect but good) on a leash. It is when she is off the leash outside that it is a problem.
I want her to be off the leash most of the time. My old dog would come and obey commands at any distance but this animal is like a unbroken horse off the leash. Put the leash on and she stays at your side.
I let her run on the beach this time of year to burn off some steam but around the yard I need distance control.
Yes the unit has 10 level settings for pain and is waterproof (another plus) I told my wife she either listens to me all the time no matter what or she is history. And I am not kidding. The next step is a boarding school, then up for adoption....just like I tell my kids.
After re-reading your post perhaps I need to get her dead on balls perfect on the leash....we are not there yet.