Panel Quatrefoil Grid Metal Sign

About the Quatrefoil Grid design

Sixteen rounded black cells gather in groups of four, each group hugging a small white diamond, and a fifth diamond opens at the center where the groups meet. Every cell keeps three soft corners and draws the fourth into a point aimed at its diamond, so each cluster looks like a four-leaf clover. White bands trace the cells, and short black ties chop those bands into dashes that run along the heavy border.