Easy to install and user friendly in standard applications: SlideOn from Hettich. The SlideOn cup hinge gives you all the benefits you are familiar with from a high quality, all steel fitting. With its double spring action, SlideOn reliably opens and closes the door in any situation. A spring moves the door either all the way open or completely closes it so that it stays either in the open or closed position. The double spring action also provides a practical benefit because it prevents scratches on the inside of the door that could be caused by internally installed moving components.