
They are very light and can be crushed. They don't stick at all to my hardwood floors. Braking power is close to zero. They slide across the ice like hockey pucks. Best used between door and wall. Even then, with enough pressure on the doors, they get crushed. There just isn't enough bulk, thickness, or weight. I've moved a lot on my travels and bought a lot of door stoppers over the years. I wouldn't buy them again.

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