Whilst Fasp swivels are undoubtedly the best in durability these look not to bad when all is said and done when you consider the lack of use in most vans paying through teh nose for a name may not be an option so have a look and let us know what you think ..... LINKY MA DOOFER
[In fairness to Fasp etc which i have in mine they operate on a roller bearing which will not be effected by grit etc where as these look to not be but at that price for limited use units im sure they would be fine]