These were first used in Vietnam between 1960s-1970s and were made mostly out of wood, they were later used in Afghanistan & Iraq in 2000s. Items Required: 2 X M3 Fasteners, 9V Battery, 9V Connector & Switch ##Note: No Raft or Supports Required !!!Note: I'm always open for suggestion and help on improving the design and proof of concept. !Don't forget to check out my other Cool designs and Follow my Daily dose of KooKoo uploads, Enjoy ;)