Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: how many blades does it have , i have only one
Document: Did not know what I did with out this. Instead of cutting one at a time you cut many in the time it takes to cut ne with a knife. It also has a few blades to cut different items.
I bought this based on the many great reviews.The reasons my wife through this out and replaced it with on at half the price from wally-worldWhy too much of a hassle for what little it produces.Why it failed for her:1. Bulky2. Flimsy3. Blades bent easily. (julienne)4. Wastes a lot of the vegetable (poor handle/prong design)
I seriously love this item. It is a great kitchen tool if you like to make homemade potatoe chips, fries, or fresh cut veggies. It cleans up excellent, the blades have stayed razor sharp (be careful) through many uses. The container for storage keeps everything in its place and doesn't take up much space to store. Hope this helps.
I guess I'm a little old fashioned and just prefer to cut vegetables with a single paring knife, but it's a pain to make salsa that way, so I finally relented and purchased the slicer. I'm completely happy with the sharpness of the blades, the ease in removing and re-installing new blades and the many choices available for slicing and cutting. Really great product!
I got this for xmas and it has outperformed any mandoline I've owned in the past. It's sharp, has easily interchangeable blades and has grooves on the bottom to help secure it on the edge of a bowl for convenient slicing right into your work vessel. The hand guard is just like many other, awkward and useless but most are. I purchased cut-proof gloves ($12 on Amazon) to use instead and I'm like a Samurai fool. Again, great and easy to use.
After reading the many reviews I decided to go with this mandoline slicer. Its really great! I've been able to get nicely sliced tomatoes and apples. I used the apple slices in the dehydrator for some great apple chips. This is really sharp! Do not use without the protective slider. I did and I'm now missing a bit of skin :)I've not used the julianne blades yet, but I expect they will be just as good as the slicers.
i am so diappointed!!! What a waste of money. this is rated one star too many. Sorry , but this is my experience with the product.
Have so many gadgets but this one would be used for smaller jobs. Unfortunately my husband tried to use it on sweet potatoes and it didn't work. He ended up cutting his finger pretty bad. Maybe the instructions should say what you should not use it on. I still have to try other vegetables. The item is very sharp,
For twenty bucks, it is great. The slider/ hand guide leaves a little to be desired, but that is a weakness on many (so I am told). I cut myself the first week (WATCH OUT - it is SHARP! ).For the step up I will be looking for one with a better slider, and a dial instead of plates. But for the price it is awesome.
Some mandolins, unfortunately, have received poor reviews due to user error. Come on... mandolins are sharp -- that's the idea.While this one may cost more than many others, it comes with a guard for holding your food. Sometimes you get what you pay for. In any case, I'd rather enjoy my homemade French Fries without the addition of finger bits.This is a sturdy utensil with multiple cutting options.
Answer: The blade for cutting is attached to the mandolin itself and very, very sharp.  Then there are 3 triangular shaped black plastic things that attach to the mandolin.  They are marked "thin slices, medium slices and thick slices".  It is hard to read as it is "black on black".  But you insert one of your choice and use the food holder and slice away!  :)  I just love mine!  Have been married 57 years and don't know how I ever got along without it!  Hope this is helpful to you....