The gary fong flip cage attaches to your compact digital camera and performs a dual role as well as providing protection it also acts as a support to allow you to position the camera in almost any position shoot vertically or use it in the horizontal position for night exposures or self timer photos of you with your friends this knob screws into your cameras tripod socket loosening this screw frees the legs to transform into different configurations and tightening it locks the legs in plac