Features:1. The screw is made of good quality stainless steel, sturdy, high strength, anti-rust and durable.2. Standard 1/4'' thread screw, with flat head screwdriver slot and hinged "D" Ring.3. Helps fix cameras firmly and stably on the quick release plate.4. With a D-ring for simply screwing it into quick release plate without any tool.5. Can be used with tripods, monopod, telescopes, ball heads, lens collars, lens plates etc.6. Allows the fitment of different styles of plates to fit directly into the base of your camera equipment via the 1/4" screw.Specifications:Shaft Length: 17mmTotal length (include base): 21mmHeight of the screw head: 4mmdiameter of the D-ring head: 16mmMaterial: Stainless SteelPackage: 1 x D-Ring ScrewIf you have any questions, please feel free to contact us by email, we will reply within 24 hours. We are pleased to offer you better service.