I use the mats on parquet: it is well protected, no marks. On the other hand: used rubber-coated weight plates.

Yes. I have done exercises with up to 30kg dumbbells or bodyweight exercises with a bench. The mats are resistant. With heavy weights, marks remain that slowly disappear.

Thank you for the answer.

I am particularly concerned about making a crack in the tiles if the dumbbells accidentally fall to the floor. Are the mats thick enough to prevent this?