What's the gadget advertised on tv that heats sticky pads to a wall which can be...

[crabbychops]

...removed without damaging wall? Is this gadget any good? Is there a weight limit to what it can hold. It fixes a pad to the wall and can be removed from the wall by the hand held gadget.

 

[sensible_man]

Called a Command Hook and is made by 3M. It will hold 5 pounds. No heat is involved.