Bongers are basically ancient oriental massage tools that provide an invigorating percussion-like massage called tapotement which improves circulation, eases muscle tension, and even reduces the appearance of cellulite. Bongers are kind of like meat tenderizers. Use one, or two simultaneously. By tapping contracted and knotty muscles you can release tightness and relieve pain. Take Bongers anywhere for quick relief of back pain, headaches and tired, sore muscles.
Tapotement actually consists of manipulations which aim essentially at mechanical stimulation of muscles or nerves; these manipulations are all characterised by their type of blow such as hacking, beating, shaking, and vibration. One well known form of tapotement you maybe more familiar with is the technique of "karate chopping" as part of a good massage.