about this item: ?【Corret Training】Dog Pinch Collar, Provides Necessary Training Pressure While Protecting Dogs Airway And Sensitive Neck Area . No need to yell at a dog or punish it. You just need to pull the training collar and the dog will stop naughty immediately. The collar naturally expands pressure to mimic the bitch carrying her puppies. ?【Safety and Effectiveness】The dog training collar applies even pressure to the sides of the neck, not the windpipe , the prong ends of the dog choke collar are protected by rubber tips which can prevent damage to your dog’s neck. ?【Easy to use】The dog choke collar has 2 strong D-rings that provide a more secure connection with the leash.