Anne , It is 1000 lbs per one slider.
There so cheaper in price, give it a try because only problem I would see is the weight of the table.
None. The furniture legs sit in the sliders, and gravity holds them in place
No, that's the beauty of them. They just glide.
The packaging says for carpet only. I believe the have other ones for different surfaces.
It would depend on the weight of the table. Extremely heavy items may crack the plastic on the bottom of the pads.
Yes you can leave it on sliders but risk movement of the bed.
Yes. These discs can be used to move a refrigerator. They are designed to move items up to 1,000 lbs. For carpet, use SKU 577675. For hardwoods, use SKU 578003.