Stealing Christmas Lights Yard Signs are UV printed on 4mm thick corrugated plastic. Comes with a pair of ez stakes per character made to easily stake into your ground. If your ground is hard, water deeply before staking. If it still will not go into the ground, you can try drilling with 3/16" masonry bit. If you live in a windy area, you can add any tall garden stake or electric fence post and put it behind your sign to make it more sturdy. These are available at your local hardware store or tractor supply. There is an image of corrugated plastic and how to insert stakes in the product listing. STAKES ARE ATTACHED TO THE PACKAGING You can also use command strips to adhere signs to walls and garages etc.