This is the case of Thierry Delhief and Americo Da Silva. They teach some of the most important French security corps. And although this information cannot be published in detail, their curriculum made an incredible impression in our editorial office (remarkable as in this office we get all sorts of information of this type). This is because both instructors have developed a system specially designed to reinforce the needs of the security expert, using the most widespread and accepted tool, the tonfa. Therefore, security experts, do not let this DVD escape, as it will be of use on more than one occasion.