Don't use a choker collar on your dog. Especially one made of cord as the cord can bind on itself and choke the dog to death. There is a reason you can only buy chain chockers. For one if your dog needs a chocker it probably a rather large dog and it does keep him under control. Secondly the chain and rings slip through each other very well so it's less likely to get stuck and kill your dog. There are always situations with long hair dogs where the fur binds up in the chain. So look at the instructables on the right for regular dog collars. But if you are going to do it anyway then just look at what makes up your basic chain chockers and i think you can figure it out.