Clearing out the attic and found this heavy metal base covered in sharp spikes. It’s rusted and looks dangerous. What is this?

vaccination, just as a precaution.
2. The Most Likely Answer: A Vintage Metal Flower Frog
Despite its daunting appearance, this spiky object is most likely a flower frog, a

tool used in floral arrangements to hold flowers in place within a vase. Flower frogs were especially popular in the early to mid-20th century before floral foam became widely available. They come in various styles, but the heavy metal base with protruding spikes is a classic design.
The spikes, or pins, allow for the stems of flowers to be positioned securely