Use our study O-ring chain connectors from Crowd Control Experts to connect double strands of chain on stanchions or to connect a chain to one side of a stanchion for foot traffic or crowd control. Use them indoors or outside. Our O-rings are available in yellow, black or white in 2-inch or 3-inch diameter sizes. They’re the preferred accessory to use when two rows of chain are required for extra security at construction sites, government buildings, public events, amusement parks and stadiums. Use them to create double-chain barriers at auto supply stores, at parking lots and at airports or schools. You can find all the discount-priced stanchions and accessories you need at CrowdControlExperts.com. We offer a price-match guarantee on qualifying purchases. For every order, rely on our fast, low-cost shipping. We also offer customized retractable belts and custom signs to promote your business or event.