【Proper Training】Dogs pinch the collar to provide the required training pressure while protecting the dog’s airway and sensitive neck area. No need to yell at the dog or punish it. You just need to pull the training collar and the dog will stop being naughty instantly. 【SAFE AND EFFECTIVE】 The dog training collar applies even pressure on both sides of the neck, not on the trachea, the pin indication of the dog’s strangulation is protected by a rubber tip, which can avoid damage around the dog’s neck. 【ADJUSTABLE SIZE】The circumference of the collar dog training collar can be adjusted, you can add or remove a single chain on the dog clip collar to fit your dog’s neck as needed. 【HIGH STRENGTH MATERIAL】Our needle ring is coach recommended high tensile chrome plated stainless steel. The dog swab collar has a silver coating to provide your dog with a stable life. Package Contents: 1 dog training chain. Size: 2.5mm*45cm