L. Borup 3 The screws are the type to go into a wooden wall. If concrete you need to drill. So, not so easy as product information claims. I ended up buying a pin-nail to mount these shelves to the wall.The leather straps are NOT attached to the shelf which is good as you can choose where to place the straps, but not good because you need to balance the shelf on the straps. I used doubled sided tape to make sure the shelf stayed in place.They are pretty though.