I think you may need additional tools for more extensive work. For example, some clients may ask you to sew or install various spikes. As far as I know, these leashes help control the dog because large breeds are pretty challenging to maintain, and these collars help with that. Mainly because it makes it more effective at teaching commands. This kind of collar was beneficial when training my dog on service commands. I also needed help at https://www.servicedogregistration.org. Fortunately, my dog is now independent and calm. Now I don't have to worry about letting him off leash.