The discs are as expected. Standard weight, and they fit very well in the standard dumbbell bars (I use the York ones with the spinlock).
The reason for the average rating is because the packaging was bad and the product seemed like second-hand!
The discs did not come each with its own plastic wrapping (as they were in all the other similar purchases I made) and they were very dirty, leaving black smudges in your fingers every time you touched them. FInally, some of the edges of the discs were chipped off or whetted or something...
Of course, they're perfectly usable. But not as you would like for a 5-star rating.