Being precise is often more important than just being strong. Being able to focus and being agile can save you just as much as being precise. These cuffs try to do both. These cuffs do have the trademark makings of Vonder Muer Rhule it is not totally 100% certain he is the maker. But he always said, "Do what you do, but do it with focus and precision." These cuffs definitely fit that motto and have the signature way of Vonder with him always adding the resistance factor in almost everything he ever made.