About this item Collar for Training Large Dogs: Ideal for walking or obedience training large, strong dogs; practical and easy-to-use dog collar Secure Dog Training Collar: Patented center plate construction and symmetrical prong placement provides natural contact for optimal communication Gentle Pinch Dog Collar: Designed to gently pinch your dog’s neck, mimicking the pinch a mother dog gives her puppies Adjustable Prong Collar: Adjust dog collar by adding or removing individual links; to determine collar size, add 2” to circumference of dog's neck Coastal Pet Cares: We design and deliver quality products that people trust for the pets they love