You can also buy a Herm Sprenger prong with a fabric cover, which holds it all together safely.
This us what we use here, with great success. The collar goes easily on and off with a quick release. You can Google and find this. Best success! smile
Frauchen von:

Grimm van den Heuvel, "Donnerpratzen"
Smokey The TeddyLion, DLH purrbuddy

Dir gehört mein Herz