[Compatibility] You can use the adapter to connect lances, spray equipment, pipe cleaning hoses and other accessories compatible with the bayonet connector (male) to older commercial guns (up to 2017) with an M22 AG (male thread). Practical: The B bayonet connection of the high-pressure fittings provides a quick and direct connection, improving operational simplicity. [Improve cleaning efficiency] Applying this high-pressure washer to the extension rod can extend the cleaning range and effectively improve cleaning efficiency. [Internal thread bayonet connection] Compatible with consumer-type accessories with bayonet.