Sufficient for use: Package contains 100 safety chains, designed to provide quick and secure connections to chains, cables, ropes or straps, chain connectors allow for quick, secure connections without tools, perfect for marine and other outdoor applications, Such as strapping, rigging and anchoring hardware for the fastest connection or disconnection, great accessories for maximizing safety chain and trailer safety Reliable material: The entire chain link is made of high-quality iron; The surface is polished, burr-free, and does not hurt your hands; To that our quick connectors are suitable for outdoor use and your work, we galvanize them to that they are durable and strong Easy to use: No tools are required for chain connector installation; Turn thread clockwise to open, turn thread counterclockwise to close, very easy to install and remove even if closed for long periods of time; Working load limit is 500 lbs. HEX THREAD LOCKING: The locking chain features special threaded ends and barrel screws for reliability and convenience; the threaded connection requires no tools to tighten or loosen, but its hexagonal design allows for additional tightening with a wrench Wide Applications: Heavy-duty carabiner links are widely used as link connectors and to secure accessories to the chain, such as extending porch swings, attaching dog leashes to harnesses/collars, raising chandeliers, extending trailer safety chains, and hanging kayaks Boat from garage ceiling, camping, hiking and other activities Colour:Silver Material:304 stainless steel Package Contents: 100 * quick connect ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.