The RP defender was actually designed by a Defenders fan. He purchased all the tools then went through the features that he liked; then did a mash up. We were also looking to make a defender that would fit in a pants pocket and this filled our design criteria. We struck a deal with the designer and off we went into production. This tool is very unique and just hurts from every part of it! So as a great addition to the self defense weapons we are really pleased at some of our success stories coming back from our defender owners.