I saw the spade shaped door knocker in the June edition of Gardeners' World magazine and loved it, so on an impulse, decided to order it. (I got it from crocus.co.uk for £5.99 with postage of £5.99 too(!), but other suppliers such as the National Trust catalogues were also suggested.) Chris suggested it could go on the shed, but I think I'm going to save it for the back door on our next house (ever hopeful!) It's made of cast iron and has a loud knock. The quirky, hand made look really appeals to me.