They are the perfect solution as spacer between glass and tables. (Like: tables, pedestals, and other furniture tops). They control the movement of the glass, and absorb the shock, on many types of surfaces including wood, metal, and plastic. They are the ideal cushions for leveling your glass table top, while also affixing it, so your table tops don’t skid. It also protects the underneath side of the glass from being scratched by one’s table.