Plastic chain master links like these can be used to repair broken links within your existing plastic chains or to securely connect plastic chains to one another. This adds increased functionality to your chains allowing for even complex crowd control barriers and visual barriers. Simply attach your chains to the loops on delineator posts, plastic stanchions, bollards, or any other post with a connection point. This master link is also designed with sun protection UV resistant technology for optimum durability and longevity. Available in a wide variety of colors, these can match your existing chains for a seemless visual barrier.