Cetacea chain martingale collars are one of your best choices for a quality training collar. Dog trainers and vets recommend this type of collar when a correction collar is needed. The martingale collar is fashioned after equine designs providing a form of a limited choke collar. The exceptional feature of a martingale collar is that the slip function can be limited to not over-choke your pet. To make the Cetacea martingale more practical than other brands we use a quick release buckle so that the collar can be put on or removed from your dog's head without having to readjust the length.