The Sci-Link 12mm Leak-Proof Nozzle Connector provides a secure, leak-proof watertight connection between your hose and 12mm nozzle device. This fitting has been designed for a comfortable grip as well as quick and easy connection. Features: Use with standard 12mm fittings Attaches on the end of any nozzle hose Comfortable grip for ease of use Instructions: Ensure all old or existing nozzle connectors are completely removed from the hose and nozzle. Attach the threaded end of the Sci-Link connector to the nozzle spray and twist until it is firmly secured. Insert the hose into the opposite end of the connector, pushing it in fully. Then push the locking mechanism down firmly to secure the hose. The connector is now ready to use. Turn on the water and enjoy a secure, leak free connection.