The RBF is comprised of 5 components and 4 screws. The main body of the switch is machined of aluminum and provides the mounting for all the other components, along with 2 threaded holes for mounting the switch to the rocket. The next largest component is the steel pin, which is turned and cross-drilled to accept a warning tag.
The remaining components are all stock. The switch electronically operates with two micro limit switches, which are wired in series to provide dual redundancy. There is also space for a third to be added if needed, which would allow for the activation of one critical and one non-critical system with a single pin.
The pin is retained by a commercially available ball detent. The detent applies force to a groove in the pin, and requires 15 pounds of force pulling outwards to overcome. The force required to remove the pin can be adjusted by tightening or loosening the ball detent.