The Alternative Reef Magnetic One is a single magnetic frag mount and plug allowing you to add one choice coral frag anywhere you want in the tank.
Since each one is unique and hand-made, the Magnetic One is a cool option to allow for an extension of coral-encrusted rock without having that fruit stand look of random frags.
These are great for a small tank where you don’t have too much room, or a large one where you just want to add a little pop here and there.
You can grab one of these for about $30 for one that will fit on tanks up to 3/8 in.