Review on POWERTEC 17201 Double Swivel Caster by Alvin Bonifacio

I've used them to replace cheap plastic casters on an inexpensive convertible hand truck from That Place With The Big Boat Emblem and I think they've greatly improved the utility. I can park the converted block with the casters locked next to the van and it will stay in place while I load it. They are also quieter, a little wider and have a lower rolling resistance than those that came with this handcart as original equipment.