One was discarded after first use, the others were discarded after second use. I wouldn't trust them unless I'm moving something much lighter than 400#, they shouldn't be rated for that much weight.
KEDSUM Portable Folding Hand Truck With Solid Construction And 220 Lbs Capacity, 4 Wheels Heavy Duty Utility Cart, Compact And Lightweight Dolly For Luggage, Travel, Moving, And Office Use - Yellow
41 Review
Heavy Duty 265 LB Capacity Foldable Hand Truck Dolly Cart For Moving, Portable Collapsible Luggage Trolley With 4 Wheels For Office Travel Shopping Use - Black
23 Review
Kumho Ecsta PS31 195/50 R15 82V summer
34 Review
Effortlessly Move Heavy Appliances With DOZAWA Telescopic Furniture Dolly - Adjustable And Secure With 4 Locking Wheels - Perfect For Washing Machines, Refrigerators, And More
14 Review