Professional dog handlers train dogs on a regular basis. Moreover, they use a special kind of equipment, like this stainless steel dog collar. You can teach your canine to obey and perform your commands with this pinch collar during the process of training. Don't think they are cruel because they have a tough look, this is a far more humane method of training than that with ordinary choke collars. This efficient stainless steel dog pinch collar works similar to mother-dog's teeth to a puppy, so it will do no harm to your Doberman if this product is used correctly.
If you want your dog's new collar to serve much longer consider purchasing Nylon Removable Protector:
Take a Look at HS Collar in 3D