The Crook Hook is a covert tool that looks to the untrained eye to simply be a back-scratcher or some kind of coat hanger. However, to those in the know, this device is a superb self-defense tool. The hook portion does a fine job of traps, locks, and takedowns. The lower two "balls" are great for blocks and strikes. Length: 9". Designed by Laci Szabo. For training video, see the Covert Impact Weapons Training DVD.