I have brought a bamboo cutlery tray to turn sideways and use as a wall shelf for small trinkets and treasures. I need advice on what kind of hooks to attach on the back. It needs to be something small that I can screw on but also strong enough to held several kilos. They will also need to sit very flat and be think so the shelf isn't angled again the wall which will cause things to slide off.
It sounds like you might be after one of these Everhang 20kg Picture Hanging Kits. If hung correctly, the tray shouldn't be at a noticeable angle. Alternatively, you could just screw straight through the bottom of the tray and into a timber stud if one is conveniently located.
Please let me know if you think this will work or have any questions.