They don't stick as well as other brands, I find it best to attach them then press the sander with the pad attached onto a flat surface then press down lightly. Grinder, start it up and let it run for a second or two to get a good grip once it's doing you good. Update: they are well priced but in the long run they cost more than they are worth, the velcro wears out long before the abrasive does and when it does your disc will fly off and you will end up with bare wood Part sanding your pad with Velcro, even if it only lasts 1-2 seconds, it will wear out. Your pad is broken so it can't even be used on good sandpaper. I had to replace mine which was only 6 months old and almost new 2 weeks after buying this sandpaper.
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