The Rhino A-tag retrofit tag can be installed in existing asphalt or concrete pavement. To be flush, the pavement must be drilled with a special bit for the center post and a countersunk area for the top of the tag. The Drill bit is for use in a SDS-Plus drill (Rotary Hammer Drill) available at most hardware stores. 

The Retrofit A-tags are held in place by a special adhesive. The adhesive is in 0.70 oz bottles and one bottle does approximately 50 A-tags.

Installation Video:

Retrofit and new construction A-tags are sold separately in a different listing at this link.

A Tag Literature Link