I've just started using them so I can't comment on their durability. At the small amount I used they seem to be decent. But here's the problem - 6 different grains, but none of them are marked and all are the same color. So it's easy to tell which one is rough, but then it's a guessing game. That means I most likely won't be using them for anything as I don't know if I'll make things smoother or not until it's too late! Seriously, taking just a tiny extra step to label them for their grit or give them different colors to match their grit could go from 2 stars to 4 stars. EDIT: I added a star because they are actually really good sanding pads and do a good job. But still I want them to be marked.
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