This mount allows you to connect a tripod → arrow antenna → cellphone. Two prints of this model are required. It uses 4x M3 screws/nuts to clamp the two pieces together, and a ¼" nut on one print so that it can mount to your tripod, and a ¼" bolt on the other side to connect another tripod mountable device (e.g. like the Manfrotto cellphone holder).