Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can this dice onions?
Document: I just love Kitchen Aid. I own the stand mixer with every attachment that it comes with, the blender, and I'm about to purchase the food processor to replace my old one that is not a kitchen aid.This particular attachment has not been very useful for me. I tried to shred and slice onions, and celery but neither of them worked.
After reading the reviews here, I wasn't sure if it sliced onions well. I am happy to say that the onions are sliced nicely. I was using a mandolin and throwing away too much, to prevent hurting myself. This is much quicker and safer. I also tried bell peppers, but the results weren't as good. Some of the peppers were mushed and some were huge slices.
This slicer will pulverize your vegetables because the blades are NOT sharp! I tried using it to slice cucumbers, peppers, onions and mushrooms. The slices are not uniform at all and large chunks get trapped between the slicer and attachment. Cucumbers and onions were really torn up. The bell peppers were so torn up to the point that I just couldn't use them, all the water content was pulverized out of them and left mostly just skins behind. It really wasted the peppers.
I tried using this to chop up onions, green peppers and garlic with this for sofrito. All I can say is that I ended up running to Wally World for a food processor. The food kept getting jammed up and much of it wouldn't even chop and got wedged in between the metal chopping cone and the plastic casing. I also had to use the larger shredder size because the smaller one didn't do much of anything.
For me this was a horrible purchase. I wanted to be able to slice onions and celery, or other soft vegetables and fruits. This is not a good item for that. If you want to shred cheese or other firm items it works okay to great. After I was disappointed with the onions and celery I tried potatoes since I make homemade chips I was hopeful it would cut down on the work, all it gave me were potatoes that already looked chewed up.
I treated myself to a new 5 qt. Kitchenaid stand mixer before Christmas and decided I needed a few attachments to make my splurge more worthwhile. While there are some things that slice and shred well, there are other foods like celery and green onions that did not do well at all. I had very good luck with hard foods like carrots, potatoes and hard cheese. Other foods were better sliced by my Cuisinart. My husband likes to cook with me and has become a fan of Kitchenaid.
yes i like this does a great will buy thank you for this great tool i like how it works
when I put the cuke in it, it come out not like the piece, it's a little chaos...and also can not cut the chocolate very  crush
very pleased, does great job shredding cheese! Came on date expected and was in perfect condition.It is fairly easy to put together also. I wish I had ordered this sooner!! !
very easy to use. I like that I can put all the pieces in the dishwasher. It's not noisy either.
Answer: It can shred and slice almost anything, but it does not dice. To achieve the dice effect I used the slicer cup (thick) and make vertical cuts in the onion, since the slicer is horizontal the result then ends up diced. But, if you are looking for large dice, the answer will be NO.