5. The KAKUTE…The finger sized knuckleduster ring. A very large range of types and varieties in this category show use historically. Many semi-concealable, if not fully… esp. at night/dim light. High offensive/defensive potential, combined, very likely, with the element of surprise, shock and subsequent onset of intense pain and loss of confidence for the opponent as a probable result. The opponent may indeed ‘ not know what hit them ‘ and has also been struck bewilderingly forceful. Some, if not many are also semi multi-purpose. The hand-claws ( SHUKO ) for example are oft. alternatively used as gripping/climbing aids, just as well as in combat. The LEGENDARY COMIC HERO WOLVERINE grows his own unique and stylish long version of this type from the inside out… The KAKUTE and etc are also another unique weapon classic that has a low learning curve; requiring little training time to ‘ grasp ‘ the fundamentals whilst instantly adding much ‘ oomph ‘ to your blocks/strikes/grabs/slaps etc. Semi-useful too against armor and blades, easily hidden… yet … readily at hand… or is that  ‘ under-handed ‘.?. photocredit/thanks:pinterest