Low Profile Installation
The medallions have a low profile when installed, as
shown in the photo to the left.  The brass base hardware is
an industry standard pool cover anchor hardware fitting (not
included with medallion) which would be installed in a
3/4-inch hole drilled into the pool's concrete deck.  Similar
anchors are also available for wood decks around spas
and pools.
Medallion With Cover Anchor
In the photo on the left, we can see a medallion inserted
into a pool cover anchor.  Normally, the anchor would be
located in the hole drilled into the pool deck.  The medallion
would hide the anchor hardware and also the chipped
concrete around the hole.  When drilling a hole in concrete,
you almost always get chips around the edge of the hole.