The Herm. Sprenger Ultra-Plus Prong Dog Training Collar with ClicLock is safe, practical and easy to use. This training collar features rounded safety tips for comfort and a solid fastener plate that provides a more secure connection making fastening the collar around your dog's neck easier and safer. Stainless steel is rustproof and sea water resistant. Herm. Sprenger offers a variety of high-quality, specialty chain products.