The Double Ended Collar Backup Clip is designed for multiple collars to effectively prevents dogs from escaping. We use a reinforced Zinc alloy to provide a stronger, more resilient finish that holds up to hard-pulling dogs of medium size. The clasps secure firmly at both ends and they are designed with swivel eye snap hooks,which is convenient to contect the harness and collar together. This dog collar clip connector is a professional pet buckle,it's a nice gifts given to your families or friends who raise dogs, protecting their dog's safety when accidents happen, ensuring your pet a safe playing time