I think it's one of
THESE?
If so it's not a lens for the camera, it's a couple of adaptors that you screw onto the lens that you already have (the 52mm refers to the thread size of the 18-55mm kit lens).
They do work, they're not great but they are only £20. Regardless of the eBay advert they will affect image quality and they will distort but what do you expect for £20?
There's no real reason not to buy one, you can get some interesting effects. Just be aware of what you're buying and whatever you do don't over tighten them onto the lens thread - I've seen that ruin a kit lens before...