Description: 100% brand new and high quality D Ring flat screw. 1/4" metal tripod screws. 1/4" metal male thread with hex socket. Can be used with tripods, monopods, telescopes, ball heads, lens collars, lens plates etc. Allow the fitment of different styles of plates to fit directly into the base of your camera equipment. Specification: Material: Iron Total Length: Approx. 12.5mm (without ring) Shaft Length: Approx. 9mm (Approx. 5mm threaded) Head Diameter(including D-Ring handle): Approx. 16.5mm Head Diameter(excluding handle): Approx. 11.5mm Head Thickness: Approx. 3.5mm Package Includes: 1 x Screw Note: Please be sure the size fits your camera and quick release plate before shopping!