Trailer Jack Auto Dolly Attachment ramps It has 10 in wheels

It has 10 in wheels for maneuvering over rough surfaces and a brake to help prevent strap overrun

200 lbs Material Non-Telescoping Model / MPN 272463 Dimensions 27"W x 44

What is this bin used for

The source lists the lock or brake configuration as Dual Pedal Brake

Walk you bike on with ease

Trailer Jack Auto Dolly Attachment ramps It has 10 in wheelsProduct Overview The Trailer Jack Dolly provides a "capture" for your trailer jack or trailer jack wheel. With a pair of Auto Dollies under each trailer wheel and one with the Trailer Jack Attachment under the jack, your trailer (and load) can now be moved in any direction (even sideways). Preserve precious floor space by storing it closer to the wall than you could hope to safely & conveniently get it by jockeying it around on your hitch! *Auto dolly