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.