 Sifu Sapir Tal 

Spikey™ Keychain is a personal security device that can be easily and quickly used by anyone who needs to defend themselves against a personal assault. or in order to gain control over an individual without having to apply excessive force.Spikey™ device is small and doesn't require batteries or electricity and can go unnoticed.  The Spikey™ key chain isn't controversial and potentially dangerous like tasers and doesn't rely on powerful chemicals.
Spikey™  is a registered trademark, protected by U.S. and international patents.
Spikey-Tec™ products are specifically developed to meet the demands required by Security    & Law Enforcement Professionals. Learn how to defend against violent attacks in this
                                             free self defense Spikey-Tec clips 
http://spikey-tec.com/Home.html