Product Review: Locks, Controls and Counters Throughout my 9 years of law enforcement, I have never received any training as beneficial as Peter Hill's Integrative Arts self-defense and locks programs.  It is simple and effective for street use and it should be taught to all law enforcement officers. Kevin Watkins Deputy Sheriff Peter Hill's innovative approach to teaching wrist locks was one of the most popular segments in 1997 among our 1,700 members. Rob Colasanti Vice President, NAPMA Peter has the best locks curriculum I have ever seen. His three tape set is a very well thought out integrated approach to teaching a wide variety of locks, counters and applications complete with drills. I'm working through the tapes in our Black Belt classes and there's plenty to keep us busy. Best video investment I've made in years. Wish I had bought it sooner. Mike Anderson Goshin karate and Judo Academy