At first glance I'm happy with this purchase. The bottom grit wears down the seam quicker than most sandpapers, but I haven't had any problems with the abrasive separating from the backing or anything. Once I got to 800+ grit and used it in wet sanding it seemed fine, maybe a little less durability/wear time but nothing too bad. I've only used them on wood and metal, but plan to use them for on-machine prep and painting. If so, I'll update this review if anything else comes up. It's also very convenient to have all those grains pre-cut, so that's a plus.
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