Applicable models - Fit for all series motorboat and outboard engines without battery and electric start. Please confirm with customer service before purchase. High quality materials - Made of high quality plastic, waterproof and durable. Light weight and strong corrosion resistance. Easy installation and operation - Extendable and flexible, with swivel snap hook to avoid tangles. This kill switch key rope is designed for emergency shutoff. Easy installation, easy to install on engine stop switch key. Anti-slip design - The surface that stands with the front cover of the motorcycle is covered with several layers of anti-slip materials and wear protection materials to ensure that the contact surface with the motorcycle is not damaged and the bracket does not damage the paint on the motorcycle surface. Use scenarios - Emergency shutoff on boats without battery or electric start, allowing a quick and reliable engine stop. - Safe docking, towing, or mooring operations where a quick disconnect of the engine is beneficial. - Routine maintenance or storage checks when the engine should remain off without relying on battery power.