All COBRA quick releases are machined from the highest grade 7075 aluminum alloy and feature solid brass and stainless steel components. Patented AustriAlpin COBRA quick releases are, without equal, the safest, most finely crafted, and strongest load bearing buckles available anywhere. They are also the only stab-lock style fastener in the safety products market that will not open while under load. That makes them the best choice (we believe, the only choice) for ensuring the highest degree of safety for yourself or your customer. COBRA quick releases are CNC machined, assembled, inspected, and packed (re: from alpha to omega) in our ISO quality assurance accredited facility. All COBRA products are tested and certified by highly respected independent /3rd party test houses and exceed Mil Spec guidelines for dust / sand / salt water as well as all applicable CE, EN, CSA, ANSI, and NFPA standards for fall-protection and personal safety. Our superior designs and commitment to quality guarantees the highest degree of reliability and assurances for safety and strength.