Well I like to tell people that I got them at Wal-Mart when they ask.
They were made by echobit. I worked with him to tweak his original slider design into this before he went out of business.They are mounted to the body in 2 places with braces back to the body mount brackets. Most people here will tell you that this is better than mounting to the frame because the frame is so far away and body flex can actually make them damage the body. You can slide the weight of the truck across something like this.
If you do any mud riding, they get caked up and are slick as owl sh!t. They will also catch your foot, especially if you wear any type of boots with a heel, if you're not careful, which could twist an ankle. Plus, if you mount them to the rocker, they are too far under the door, which causes you to hit your shin on the rocker. I yanked mine within a couple of weeks after installing them.
I thought that kindof stuff might happen when I thought about using a chain. It SOUNDS like a good idea at first, would move over rocks, not bend or break. As was said wet muddy chain is like slick snot. And when you slide your foot in and it swings inboard of the truck from your weight WACK! into the rocker, then your leveraging your shin against the rocker while trying to get in the truck. OUCH! does not sound fun.
