What possible difference could that make? It should say in the specifications.
mine is straight. I think yours has a defect.
Not made in US. Made in China but seems very well made.
Just says Ames Established in 1774.
Made in China.
The blade is not sharpened and is blunt by design. An angle grinder would be needed if you decide that you want a tapered, sharpened edge. Mine worked fine as designed.
Warranty information is available on the Ames website: https://www.ames.com/resources/warranty/
I push mine the whole depth of the blade. Very nice look when it's done and it leaves a good enough space to get a nice layer of mulch in.
Yes it will. However I recommend you water the area well making it easier to edge and then install border.
As long as you don't lift the soil, no need to shovel. Just press straight down to edge where you want to.