- Durable, corrosion-resistant construction: made with high-quality materials and fine workmanship for long service life. Rust-proof and built to withstand repeated use. - Secure, heavy-duty captive screw: captive design keeps the screw attached to the D-ring while allowing reliable, direct mounting to a wide range of plate types. Reduces the chance of losing the screw during setup. - Versatile use with or without a plate: mounts directly to quick-release plates, tripod heads and other mounting plates, or can be used without a plate to fasten your camera directly to a strap. - Universal size and easy operation: standard 3/8 inch screw fits common plate threads. The D-ring incorporates a slotted head that can be tightened or loosened with a coin or a flat-head (slotted) screwdriver for tool-free adjustments in the field. - Compact, practical design: foldable D-ring allows low-profile attachment when not in use and simple hand or coin operation when needed. Typical use scenarios - Mounting a camera to a 3/8 inch-threaded quick-release plate on a tripod or fluid head for secure shooting. - Attaching a camera directly to a shoulder strap or carrying strap when you want a simple, plate-free connection for travel or event work. - Securing a camera to camera cages, rigs, or accessory plates that accept a 3/8 inch captive screw for stable, repeatable positioning. Specifications and function summary - Screw size: universal 3/8 inch - Type: heavy-duty captive screw with D-ring - Operation: slotted head (operable with coin or slotted screwdriver) - Key attributes: rust-proof, corrosion resistant, durable, fine workmanship This captive screw provides a straightforward, dependable way to mount and secure cameras to plates or straps while keeping the fastener attached and easy to operate.