Our stakes are made out of aluminum. They are anodized with a protective black coating.
The stakes are 20″ long with a point on one end and a 1″ 3/4″ bend on the top. The cut ends of the aluminum are not anodized because they are cut to length after they are coated.
The bend on top has an outdoor/exterior 3M adhesive double-sided tape on it to attach the sign or tag. The tape is so strong that we haven’t successfully removed a tag from a stake without bending the tag!