"They're wheels, how much of a review can I give them? The wheels are round, which is handy. They're rubbery so won't scratch your shiny floor. They have holes to screw or bolt the onto a flat surface and the chassis is made of metal and seems very strong. They don't look like they'll stand up to much if they are kept in the wet because the metal will rust. But in the dry they should be good for years & years. I'd put oil on the axle so they turn nicely if I were you. They turn fine without it but oil will help them to last longer. Actually, that was quite a big review for such small wheels. Obviously got too much time on my hands or, possibly, struggling to focus on the important tasks I have."