The Flat Head D Shaft D Ring 1/4″ inch Screw is a versatile accessory that can be used with tripods, monopods, telescopes, ball heads, lens collars, and lens plates. Made of stainless steel with a silver color, it weighs 15g and has a shaft length of 4.5mm and a head diameter of 16mm. The D-Ring features a 1/4″ metal male thread with a flat head screwdriver slot and hinged “D” Ring for easy adjustment with a coin. This screw is compatible with quick-release plates, QR plates, telescopes, ball heads, and more.