These are junk, I threw away about half of them because they either slow down or roll over a little making them useless. I was able to install another one in the same hole but it lost its grip, these plugs were meant to be installed the first time. If you buy them, make sure you use the largest screwdriver possible for a tight fit, although they can also break. They also need to be pre-drilled, they will break if I try to use them as bits. (It's designed for that)
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