wilfa it is actually from Palico coffee, named as palico pro burr : 58 mm flat burr 40 steps with digital scale ( bluetooth and app ) measured from picture, the threads is ~1.08mm, 58 steps per rotation each step size is 18~20 um so far, the reviews online said it is very good for hand pour or aeropress, and is fine enough for espresso, albeit it is not a stepless grinder