If you ask most dog trainers which prong collar they would recommend, 9 out of 10 of them would say, dog collar Herm Sprenger. Here's why: Herm Sprenger (also called pinch or training collars) is very effective at training dogs in a short amount of time. They're also suitable for dogs of almost all sizes and breeds, thanks to their uncompromising quality, outstanding performance, and high tensile strength. With a Herm Sprenger prong collar, you can achieve harmony in your relationship with your dog without any nerve-wracking experiences.