Yes, they use existing holes in the frame. I received them this past Friday and I'm attaching a photo. The sliders are stacked on top of each other, so it looks like it has 6 mounting locations, but it's 3 points per side. They seem really well made and I hope to get them cleaned and pained in the next couple of weeks. I got roped into coaching Soccer, so I'm now behind on all of my honey-do's and this will keep me from getting the sliders installed quickly
I ended up buying the same ones. I like the raw look of the welding and everything so I was looking into a way to protect the metal while preserving the look of the bare metal but nothing promising so far... Any idea what color you're going with or what you're gonna use to do it?
