1. P chain is a lot of master like the dog training tools, mainly for daily training dogs, pull dog division traction use.
2. Its greatest feature is the scalability, when the dog according to your request to do when the chain is always loose, when it shows disobedience or even want to resist, the chain will naturally tighten.
3. The owner of the dog can buy a try, try their own training dogs, tune out the most gentleman's dog!