ALZO Liberator Battery Door Clearance Plate for Nikon P610, P600, P530, P520, P510, P500, L840, P780, Tripod Mount Adapter Solves Battery and Memory Card Access Solution to allow battery and memory card access when camera is mounted on a tripod or a rig Special 3M grip rubber base prevents rotation Two (2) 1/4 inch x 20 stainless steel female thread tripod mount holes Can support cameras and gear up to 5 pounds Includes flush hex screw mount