Fawkinay

Hey everyone at h-tech, i was wondering if somebody may enlighten me on something i have been trying to figure out. Does anyone by any chance know of a locking system that i may be able to incorporate to the top (left hand side for passanger and right hand side for driver) a lock that way car jackers wont be able to pry the top of the door open to get into the car. I do not know if such a thing exists and if it doesnt maybe someday in the future i can make gazillions of dollars designing one. But for now i just want to have the best security possible. Thanks in advance