There are four types of towbars that are available for most modern vehicles they are the Fixed Flange
The swanneck towbar is a slimmer option to the fixed flange. There are pros and cons.
Pros will fit Alko hitch and standard hitches.
You can not attach bumper protection plates or drop plates
The swan neck does extend further out than the fixed flange option
You are unable to use a cycle carrier at the same time as towing