I own a dog training business dealing with general training classes through to counter conditioning behavioural work. Some cases involve very aggressive behavioural problems including high level human and dog aggression. I have struggled to find equipment, outside of military network, that is up to the job time and time again. This particular item is not just functional but extremely well made and designed. It works on the more powerful, taller breeds and is pretty much indestructible. I use it for training, agility and even during counter conditioning cases. It works!