This attachment works on my Shark Vertex but spins incredibly fast and makes a loud buzzing noise that annoys me and everyone in the house. In fact, it's so loud it's probably rising to unsafe levels, much louder than the vacuum cleaner itself, and the decibel level is comparable to that of my old petrol lawn mower. I've used it on a nice leather chair and while it was effective I'm not sure it's safe to use on upholstery for long periods of time so I wouldn't given the insultingly loud noise and potential damage to surfaces recommend it appendix. This isn't really necessary as the other accessories that come with the Shark do their job of making this item redundant.
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