This is a tiny (20x20x6 mm volume) plastic wire guide for less than 4 mm diameter wires. Just put a piece of double sided tape on the big square area on the bottom, guide the thin wires through the guiding slots and attach it to the wall. The guiding channels are crossing each other so you can use this single piece in corners as well. I used a couple of these to fix a thin LED stripe power cable in a bathroom where I couldn't drill the wall.