Property me to extend this 8 weight plates ordered my dumbbells. Sunday ordered - Tuesday delivered - Top. The quality of the discs is good, the holes are in the middle, the paint does not smell, stained minimally from. Weight should vote (but did not re-weighed). The size of the holes I have not measured it, but should correspond to 30/31 mm, as they have a little more game than the original disks on my 25mm barbells, the original, however, are only in 3-6 months have been available, which is why to this I here handle. Conclusion: I would highly recommend these disks and would / will buy again.