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These hooks have adhesive backings that stick to walls, so you don't have to put a hole in the wall. Weigh the object first so you can pick a hook that will properly support it. Adhesive hooks come in various sizes and should say how many pounds they will hold. The largest of these hooks hold 8 pounds (3.6kg) and the smallest are rated for only 1 pound (0.45kg) of weight. Use 2 hooks for extra support if your item has a wire or two hooks on the back. Use a clean rag or paper towel and some rubbing alcohol to scrub the area of any debris. This will ensure that the adhesive will stick firmly to the wall. If you don't have rubbing alcohol, you can use some warm soapy water to clean the wall. Rub the spot dry after cleaning. If the item you'll be hanging has a wire hanger on the back, be sure to consider the length of the slack. Test this by pulling the center of the wire tight toward the top of your object. Measure from the bottom of the object to where the wire catches. If you are using 2 hooks for an object with two hangers on the back, make sure to measure the distance between the two hangers to make your marks on the wall. If you are using 2 hooks for a wire hanger, measure the width of the object you are hanging and divide that number by 3. Your marks on the wall should be that distance apart. If your hook's adhesive strip is not already on the back of the hook, peel the liner off one side of the strip. Line it up to the back of the hook and press down. Some adhesive hooks come with the adhesive already affixed to the back. Skip this step and move on to the next if that's the case with the adhesive hook you have. Remove the paper lining on the back of the hook, line it up straight, and press the hook firmly onto the wall. Hold for 30 seconds and release. Once the adhesive has dried, hang your items from the hook(s). If your item pulls the adhesive hook off the wall even after you've waited, check to make sure you've used a hook that is appropriate for the weight of your item.

Summary:
Choose adhesive hooks for objects up to 8 pounds (3.6kg). Clean the wall with rubbing alcohol for a better hold. Make a small pencil mark where you want the center of your hook to be. Remove the liner from the adhesive strip and affix it to the back of the hook. Press the adhesive side of the hook to the wall for 30 seconds. Allow the adhesive to dry 30-60 minutes.