They actually work too well. I used them on the back carpet of my Cadillac XT5 SUV and they stuck so well I had a hard time getting them off. Even when I laid them lightly, when I took them down it pulled a noticeable amount of lint out of the carpet. UPDATE - I really wanted to use them, so I went to Walmart and found Cargo Liners in the car mats department. It has a low pile and these blocks will cling to it securely. I cut to size and these blocks work great with the weight of any weight placed on them.
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