I've been looking for my kitchen by hook and a paper towel holder, I can not attach to drilling. The Wenko Magic Loc system promises this. At this point I would like to quote the paragraph 1 of the operating instructions: Holds at all points airtight thanks to the force of the vacuum. Not holding on porous substrates such as natural marble tiles unlasierten etc. (End quote) This note has been missing in the product descriptions. Since I have a granite wall covering, has not kept the suction really long (max. 2 hrs.). As a solution, I have adhered to the granite of Hama 80mm adapter plates for suction cups. Since then, keep the vacuum suction. This solution has the disadvantage that the position of the hook and the toilet paper holder can not weren so easily changed. The adapter plates also increase the total price, but are essential if marble or granite is available as a base.
