I tried using these for sanding Douglas fir 2x12. As soon as I started sanding, the sand started flying off the paper with very light pressure. After 15-30 seconds I stopped and examined the block. It has completely deteriorated. It was immediately clear that this was a fake that wasn't supposed to work but was meant to trick people into buying and hopefully too lazy to return it. Revane, I definitely urge you to stop these sellers. It definitely undermines the shopping experience when you have to sort through such fake products.
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