Bill Nuata was one of the most gifted American Judoka’s ever; and this is his contribution to ground work or grappling. This is a fabulous DVD that really delves into one particular area of Judo- the arm lock. He will show you so many different ways to put an arm lock on; it will amaze you; that is for sure. He will show yo so much about the various types of arm locks and the methods of applying them; that you will have your head spinning for months as you try to figure them all out. Nuata was obviously a master; his attention to detail his easy-to-learn-from style; make this one of those must have DVDs. 30 min.