These are suitable for hanging every size of my solid panel weatherproof art either indoors or outdoors. Mark out the four corners of a square that matches your chosen artwork size (use square sizing guide below) and then screw the clips in to the wall creating a cradle for your artwork to sit in. The non sprung clips should be at the bottom. This is a very solid and permanent option so you should be sure of where you are choosing to locate your artwork. I recommend using a set square and spirit level for the job and pre drilling the screw holes and using wall plugs to ensure a secure attachment. If you are unsure about your abilities it would be a good idea to enlist the help of a handy person.