Herm Sprenger Stainless Steel Prong Collar with a Click-Lock (ClicLock) Buckle (2.25 mm x 16 inches) : Prong Collars, Pinch Collars, Dog Training Collars, Curogan Collars, Chain Dog Collars, Fur Saver Collars, Choke Dog Collars, Herm Sprenger Collars