I had to look for these devices for repairing gliders on a chest of drawers from the 80s. While it takes a bit of effort to pull out the drawers (you have to pull hard to get past the "guardian"), remove everything and reinstall, I'm happy to report that these dual rails work really well. I believe small drawer spacers/rubbers are included for the edges - I've used them very well, but I've also ordered an extra set of slightly thicker ones for the edges where I need a bit more height. You should replace your broken and worn out airframes with little effort. highlighted.