The Nikon TRA-3 Tripod Adapter makes it possible to mount certain Nikon binoculars onto a monopod or tripod with a 14 inch screw thread. The compatible Nikon binoculars include the Monarch Action & Action Zoom series plus the 7x 50CF WP7x 50CF WP Compass 7x 50IF WP7x 50IF WP Compass & 10x 50CF WP models.