They are just adhesive vinyl graphics film. Gold numbers with black shadows. The gold is transfered onto the completed finish using a low tac transfer tape that looks a lot like masking tape. I use this tape for a variety of jobs. Once the letters or numbers are in place then the black shadows are slid in place using windex on the surface. Use a paper towel to squeeze out the windex under the decal and just let it dry for overnight. Smooth down the decal with finger pressure and clean the area with a little more windex and wala! I have a decal and tag business where I make industrial identification products for machinery and control panels. I also have my own laser. Makes life a little simpler! At least it would if the economy would pick up more.