The thickness looks a little smaller than I usually do but should be fine.
It’s not quite as sharp as my mandoline so it might get tiring.
The slicer is very small, so you might have trouble with large potatoes. I usually cut potatoes on the small side (for smaller slices) anyway, so this might not be a problem.
You should get something to protect your hand since you’ll definitely cut the tip of your finger off if you slice 6 lbs of potatoes like this without a guard.
I actually have this exact box grater so I sacrificed a potato for science and determined:
The thickness looks a little smaller than I usually do but should be fine.
It’s not quite as sharp as my mandoline so it might get tiring.
The slicer is very small, so you might have trouble with large potatoes. I usually cut potatoes on the small side (for smaller slices) anyway, so this might not be a problem.
You should get something to protect your hand since you’ll definitely cut the tip of your finger off if you slice 6 lbs of potatoes like this without a guard.