StairSlide nests (overlaps) on top of other StairSlides so they can extend to cover more stairs. In other words, you can use a single StairSlide on the bottom three stairs or use four StairSlides to cover approximately nine stairs. It all depends on your appetite for thrill. StairSlide's patent-pending, self-anchoring design uses unique features to help prevent it from moving during use without the need to permanently install StairSlide on your stairs. Download Instructions