The item is designed to put paper towel in kitchen, then mount on wall surface. The stainless steel holder rack is rust proof well, easy to clean if get dirty, just use paper wipe out.
Whatever you want to mount this holders, high power vacuum cup will help you mount it on smooth tile firmly and easy to change the position without screws and remain holes on wall; for rough surface, silicone glue also let you fix on wall without drilling.
2 x Suction cup
1 x Stainless steel holders
1 x 10 grams silicone glue
2 x 10 grams glue base