The Witter detachable swan neck towbar is slim, secure and simple to use. Most towball mounted bike carriers are suitable for this type of towbar but be aware that this means that you cannot tow at the same time.. The detachable towball neck is easily removed and stows away in its own bag when not in use. Only a small part of your towbar remains visible when detached. When fitted it has a safety lock feature to give a visual indicator of correct attachment and it can also be locked to prevent theft.