Furniture Dolly 4 Wheels Heavy Duty Portable Furniture Moving Dolly with Interlocking Function for Moving Heavy Furniture. Small Flat Dolly Cart 300Lbs Capacity, 2 Packs

They are quite sturdy and you can attach them together.

Works very well!!

I have my 50 gallon Rain Barrel sitting on these connected together. It is a perfect fit. And I can roll the barrel around the deck. It isn't bowing or bending at all.

Great for moving furniture or as a makeshift mechanic’s crawler. The puzzle piece connection points are a little tricky and are prone to coming loose if one of the plates tilts. Because of this I’d recommend using the plates separate, or loading heavy objects perpendicular to the join so that you don’t suffer a sudden shift in weight if the connection comes loose.

The media could not be loaded.  Exactly as described. Not the normal use case but if you have an aerogarden farm it's like it was made for this. Wheels are really useful. This is 3 sets, or 6 pieces. 2 sets under the 24 xl model and 1 set under the 12. Surprisingly easy to place on these and to connect or separate without draining. Video to show how easy it is to move a lot of them linked together with heavy stuff on it.

I've only ever tried one style of furniture movers. They were smaller and meant to be used at the four corners of an item. However, they didn't work. Nothing would stay on them, they were bulky and heavy for such small items. I was hesitant to even try this given how terrible the other ones were. I'm happy to report these are so much better. They actually work, and I'm really appreciative of that as I'm getting older and can't move furniture as easily on my own as I used to.

Maneuverability is good, no issues with stability or wheels not working properly. seems to bear weight well and no buckling or anything like that. No issues with them so far!

Good idea but didn't work for moving heavy furniture over plush carpeting