The Kappa BF35K Tanklock ring fitting kit attaches the Tanklock flange to the fuel tank filler cap. This allows the tank bag to be fitted to the motorcycle without the need for magnets or straps while still making it easy to re-fuel. Quick and easy to fit and remove, this versatile system is a must for any tourer/commuter. Please note the Tanklock flange is supplied with the Kappa Bags and not included with the ring fitting kit.