Wwaste of money. Don't do it to yourself. Get some EZ brushes for the barrels and some Vikan brushes for the faces of your alloys.
Better off getting a good brush vs this attachment
Read the reviews https://www.amazon.co.uk/K%C3%A4rcher-Alloy-Pressure-Washer-Accessory/product-reviews/B00HF2XEYU
Is it any good or just a waste of money ?
Are these any good, look at bit pointless to me, isn't it better/more convenient (and cheaper) to clean the wheels with a normal wheel cleaning brush and then jet wash afterwards?