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I'd say they're about medium. Not awfully slow but slower than the Norton 1k, which is slower than 1k sand paper.

The sandpaper abrasive makes it cut faster.

Naaaaaaw... Just get it wet on both sides and slap it on a wet flat surface when you use it for rough work. We use it to SAVE time/labor :nj

1k is only used for extremely dull edges or edges that have been sitting for so long that the oxidation made them brittle. A 1k stone would do the trick, but the 1k sandpaper is faster and quite a...