Amazon.com : Backup Collar, Double Ended Clip and Carabiner for Prong Collar, Pinch Collar and Dog Harness, Safety Use for Walking and Training (L, Black) : Pet Supplies
Amazon.com : 8 Pieces Dog Collar Clip Prong Collar Safety Clip Adjustable Nylon Prong Collar Backup Collar Harness Connector, Double Ended Backup Clasp for Dog Harness Pet (Cute Colors) : Pet Supplies
Amazon.com : Gentle Creatures Collar Companion - Mini - Small Dogs Collar Backup Clip for Dog Harness, Prong Collar, Pinch Collar, Gentle Lead - Double Ended Backup Clasp - Harness to Collar