OXO Mess-Free Salt Grinder $26 + Delivery ($0 with Prime/ $59 Spend) @ Amazon AU

Good quality grinder with very well defined and consistent grind levels. You can dump out the salt and use it for pepper if you want.
I have used the same one for black pepper for about 5 or more years and it’s still going strong.
Typically $29.95 , so a $4 discount