Brand new Turn Button, two screw hole base, double height to accommodate 2 eyelets on one stud. Positive locking fasteners that will never open accidentally. Each stud is assembled with a spring mechanism, holding the fastener under tension until turned by hand. Common Sense fasteners are positive locking fasteners that will never open accidentally. Each turn button studs are assembled with a spring mechanism, holding the fastener under tension until turned by hand. Black oxide coated brass construction. The industry standard for marine fasteners. Ideal for salt water or fresh water environments. Questions? Drop us an e-mail here on Amazon or give us a call at our store. We enjoy hearing from you! Northwest Tarp & Canvas - Bellingham, Washington