DEYACE Dog Collar Extra Links 2.25mm, Designed for Training Collars (4 Pack) Stainless Steel Smooth Surface Dog Training Collar Links

I had a 3.5mm Supet prong collar that just needed a couple more links but I couldn't find that brand so I bought these. They were too large but company immediately sent me the smaller size 2.5mm and those worked just fine. Were fairly easy to put on and are a pretty good match for my prong collar. Company told me that the 3.5 mm refers to the diameter of the wire, which I didn't know, so possibly my original collar was mislabeled.

These are sturdy and great once you get over the point of putting them in. I hated it, hurts and you really have to put your arm into it.But works great.

These prongs fit into the collar that we have, but they don't move quite as freely as the ones that came on the collar. They are also slightly larger that the ones in the collar that we use despite the collar and the links both being described as "small 2.5 mm". These work for our purposes of being worn periodically/temporarily and only during hands on training with our dog. They were considerably more affordable than the other brands.

Extended the collar I had already to fit a bigger pup. Easy to pinch and use

Perfect way to replace damaged prongs or increase size of collar for growing dogs without having to shell out $40 for a new prong collar.

Too big and when I tried to return and when I tried to return it would cost me more to return than what I paid for then, so I just ordered the next smaller size.

I was expecting to have to order another training collar because I wasn’t expecting much because of the price. I was wrong! The links are great quality! Exactly what I was looking for! Thank you for a great product!

They're ok and will do the job. They aren't an exact fit with the Sprenger so they don't move as freely. If I had known this ahead of time I probably would have just spent a few more dollars, but not bad enough to return. They're also harder to pinch. It'll do.