Item Type: Quick Release Plate Mounting Screw Material: Zinc alloy Gross Weight: 66g / 2.3oz Size: UNC 1/4-20 Head Diameter: 20mm / 0.8in Package List 5 x D Ring Camera Screws 1Screw Specifications: Screw thread diameter is UNC 1/4 inch, head diameter is approx 20mm / 0.8in. Universal specifications for a wide compatibility. 2Zinc Alloy: Made of premium zinc alloy material, which is durable material,fine workmanship, rust and corrosion resistance,long service life. 3Camera Protection: Rubber pad design, effectively anti slip and prevent your camera from scratches. And it can rotates smoothly and locks to keep your camera safe. 4Replacement Parts: It is very suitable for carrying spare when taking pictures outdoors. For immediate replacement of accessories when needed. 5Lightweight and Portable: This quick release neck strap mounting fixing screw is lightweight and has a compact size, which is portable and easy to cary.