The brakes feel somewhat plastic/less sturdy, but are performing well. Really like them for indoor low bookshelf.

Wheels lock easily, tab to unlock the wheels could be a little easier to unlock, it seems like you would need to use your hand. They roll smoothly and lock in place well. Has the brakes for safety.

Came with all hardware needed to install. Also came with nuts and bolts as well as wood screws. I also like that they came with the bolting hardware as well, not many do. Comes with two kinds of mounting nut and bolt.

Wheels are for pallets holding 16 modules. Installed on a harbor freight wood working table. Replaced worn out ones on my old matco tool cart.

These casters aren’t heavy duty at all. Maybe in a light application but definitely not 3k lbs. Sending them back. What a joke of a product.