The Cold Steel 12CT Safe Keeper III Push Dagger Knife Satin Plain Edge. The Safe Keeper® III offers outstanding versatility, especially as a boot knife. Its light weight and overall length of five inches make it the perfect combination of small size and big performance. The single edged design of the Safe Keeper® III means you can safely "choke up" on the blade for extra fine work, while the false edge provides superior point strength. With only one sharp edge, the Safe Keeper® III can double as a rescue knife.