[Liesje]

There's various brands and types of material. The biggest thing is that you want to make sure the ends of the prongs are smooth and rounded. Some of the cheap pet store brands just have them cut off flat, which creates a really sharp edge. I have a Herm Sprenger prong and a more generic brand but both have worked fine.

Bad

Good

 

[Liesje]

I would go with Herm Sprenger, they kind of have the majority of the market anyway and the most choices. I actually prefer my pet store brand one over my HS one though b/c for whatever reason the prongs on the HS one unhook very easily (doesn't really take any strength to pinch them, thus I've had the collar fly off when the dog is scratching his neck, and yes it is fitted tight and correctly), but my HS one has no rust and the pet store brand has a little rust after 3 years. I have a quick release on the HS one but it just stopped working so I just unhook it normally with two links but like I said it's really loose so it's not hard. I know people don't usually like them but I have arthritis in one hand.