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、Allows the fitment of different styles of plates to fit directly into the base of your camera equipment via the 1/4" screw 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: 17mm Total length (include base): 21mm Height of the screw head: 4mm diameter of the D-ring head: 16mm Material: Stainless Steel Package: 1 x D-Ring Screw