I have a stack of 19" rack units put one over the other without a frame or anything, so they were sliding one over the other like crazy when I pushed the buttons.
I thought about buying this to put in-between each rack unit to increase friction and make the stack more stable.
And holy s**t did it work!
I cut the inlays in half and put them in between the rack units and after a couple of days of use, they don't slide AT ALL.
It's like they're screwed to a rack mount!
This thing is REALLY high friction!
100% recommended.