a radiator shelf (Bevendean BN2)

this is a metal radiator shelf, 122cm by 13 cm. It simply sits on top of the radiator with the down arms sliding between the radiator and wall. We had it on a single panel radiator - and it was so stable I thought it was screwed onto the wall. Its very useful for keys and hats etc. A little misunderstanding means it didnt get picked up last time it was posted. thanks