cheap at argos las ttime i looked

Well congratulations & lucky for you!
I certainly didn't get the £7.50 deal when tried.

Amitha it was not "Absolutely useless" it was because you were to slow

Absolutely useless...
The given £7.50 link gives me Amazon site asking for £24.85!

Loks like I was too slow. Clicked the link it's back up to £24.85
Heat anyway for the post OP

Anyone??? Will it fit a Karchar?

I agree with mjr600 - recently got the bosch AQT40-13 pressure washer for £75 off amazon. Came with this attachment - cleaned 25m x 2.5m drive in an hour, not been cleaned for 5+ years since my last washer died and went back to Argos. Just works so well and then used nozze down the edges and the numerous crevices in my poor old battered. I think it was half an hour to actually use this attachment and the rest to do the finishing touches and spray all the green down the drain.

Thanks OP, I'll take the plunge. Not sure if this will fit as I've got the cheapo Black&Decker washer from Tesco. Can always return it.

Not sure how useful this comment is but as someone who likes a 'green' free drive, deck, patio, garage door and walls the Karcher T-Racer is probably up there with the best 'toy' I own. Even if you have to get one at full price, a minute into using it you will wonder how you ever did without it and ponder all that time you wasted with the jet wash nozzle trying to clean stuff whilst leaving single cleans lines where you moved it too slowly and it cleaned just a little too well. If this Bosch one is half as good it's a bargain.

a reviewer states the following
'Q: does this fit any pressure washer?

I have an old karcher - the fittings are just like you buy from anywhere the standard push fit stuff - any ideas if this will fit - reviews suggest not universal but the pic looks similar

£7.50 at Argos