Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Do the wheels fold 90 degrees and how do they lock in place ?
Document: I use this to lug around just about anything. I am 5'7" and it works well for me. Just the right height. The fold flat feature is GREAT in my nearly non-existent trunk.
This is incredibly easy to use, lightweight, but solid. The wheels are smooth rolling, and it folds up for easy storage.Highly recommend!
Durable, and solid construction. The big wheels are helpful for placing foot next to for leverage when tilting back. Lightweight and doesn't take up much space when stored. Highly recommend.
Works extremely well. Feels sturdy, well made. Wheels are smooth, no wobbles. Highly recommended, I doubt you'll find a better compact hand truck than this one. only 4 stars because these manufacturers refuse to give us a longer telescoping handle. cmon! !
For the price it's a very nice hand truck. The wheels are quiet too over brick hallways, and since it's used at a local community college that was an issue with other carts. It's also nice to have on board straps, so you don't have to go looking for those when you want to use them. The handle extends so tall people don't have to bend over, another nice feature.
The wheels roll smoothly. The construction is very sturdy...and it's lightweight. For this female:) light weight is a very good thing. It was one of the selling points for me.I can't say enough good things about this folding hand truck. Buy  the WESCO folding hand truck with the load capacity of 175 LBS. You'll be glad you did.
Between the manufacturer and their designated vendors, getting replacement bearings was more a pricey headache than it was worth. Cheaper to buy a replacement than fix.I give it a four star rating as a light duty hand truck doubling as a tool cart. If you aren't trucking heavy loads over long distances it shouldn't be an issue if the wheels wobble.
I bought first a similar Stow-Away handtruck at Office Depot: it was too small for me (5'07) and very heavy. The Wesco Superlite Folding Cart is perfect: it has the perfect size, the perfect weight, folding wheels big enough for being pulled up stairs and either pushed or pulled down stairs with whatever needs to be transported...
The positive reviews about this item are true: 'Snaps' open and closed with ease, and it's light in weight. Has a large 'platform' that holds good sized boxes, and the wheels are wide enough to provide stability. Folds up small. Not for moving filing cabinets: but for moving boxes down aisles, into elevators, and into the office, this is a good choice. Well Engineered!
The cart is unbelievably rugged and well worth the money if you are a serious traveler. I've had the cheap Chinese, wire carts with the tiny wheels and they just can't stand up to rough use. Small wheels equate to bumpy, unstable travel. They will constantly tip over.The Wesco is well engineered with very large wheels that give a very smooth ride and consequently greater stability. It's actually hard to tip one of these over.
Answer: no