Mad Cook
Master Chef
The question was about julienne cutting.I think I need to see the thing out of its package to understand how it works.
It doesn't look anything like the julienne blade for my mandolin. Well, maybe the blade I'm thinking of is actually for cutting French fry strips.
Personally I don't think the thing in the photo would be any use at either julienne-ing or cutting french fries. The gadget I have is a very efficient German model with a holder so you don't julienne your fingers and 4 ferociously sharp blades for 2 thickness of slices and 2 different sizes of julienne.
Unfortunately there are a lot of poorly designed gadgets on the market for the un-wise and the poorly "educated" not just for cooking.
Sadly, the charity shops and rubbish bins of Britain (and probably the US too) are populated by gadgets that seemed a good idea at the time - and I'm not ignoring my own ill-advised purchases, either!!!