In the shelter, we are not moving the crates very far, usually just to clean or rearrange the storage space. Therefore, we've found it more economical to just go to the "box store" and buy 4 casters/rollers for the corners of the cages.

Pros: durable, manuverable

Cons: price

These are great to have around the shelter so that you can clean under the crates. They are easy to pull and move around.

Pros: easy to move

Cons: none

These are a must at our shelter so we can pull things around without hurting ourselves. We have several cat cages on these as well so that we can move them around easier to clean.

Pros: pulls easily

Cons: none

This is great for heavy items. It makes it easy to move those items. Good for crates, dog food and other items. I love this thing. Makes my life a whole lot easier.

Pros: Great for heavy items.

Cons: nothing.