Well original out of the box was 500 grit! But it seemed to shine up with use.
Also hits better on many conditions as it shines up.
I often sand to 1000 or 1500 on balls like this and polish.
Back when I saw more head oil on left I sanded to 600 and then used Hook it!
Ummmmm, Mmmmmm!
Then it really died and I Sledgehammer souffled it a couple of times.
Hooking like a lot again, but very smooth(that's the drilling(hook/set).
I have had one's near stacked and they did not do much for me! Others say it is very snappy. I found that with the Hammer 4D reactive it's first cousin!
REgards,
Luckylefty