This concept works by holding the coral against the Coralok disc until the coral attaches, then the Softie Smasher is removed. The four indentations found on the sides of the Coralok Disc fit snugly with the four posts on the Softie Smasher holding it firmly in place. So, you'd place your coral frag (mushroom, green star polyp, etc.) on the Coralok Disc, then slide the Softie Smasher over the disc trapping the coral inside. It is held there until it grows onto the disc, then the softie smasher is removed.
In trials, this concept worked, but not as well as it could. Small coral pieces escape through the top and tall coral pieces are hard to position correctly. Additionally, things grow on the Smasher and to work best, the Smasher itself needs to resist growth so it can be removed easily without damaging the coral.
New iterations may include using a different material and/or a different shape to accommodate a greater variety of coral or perhaps, our newest top-secret thingy will make this concept obsolete. Stay tuned!