Superior Products Quick Connectors (also called quick connects) are designed and manufactured to allow a quick and secure connection/disconnection for torches and hoses. All quick connectors/quick connects are designed with features to ensure superior performance and safety:Durable brass coupling pin Designed for "B" torch and hose fittings Design guided by ISO 7289 safety standards Non-interchangeable oxygen/fuel gas connectors prevent cross connections Built-in automatic gas cut-offs shut down upstream gases when disconnected