This 1/4"-20 to 3/8"-16 Male to Male Adapter from FLM is a replacement part for the LB-15 and LB-25 leveling bases and the P-1 panning base. It can be unscrewed from the bases and reversed to accept both 1/4"-20 and 3/8"-16 female threaded mounts. It can also be used as an adapter to allow two female screw mounts to join securely.