Works with the 3/16" thick clear tempered glass panels (sold separately). Each plastic lexan connector taps into place with a rubber mallet (not included) on edge of glass panels for easy assembly of glass cube merchandisers. Clear plastic clips will not relax their grip, and will not discolor. Use the two-way connectors to join two pieces of tempered glass panels together (at the front and back of each glass panel). Two-way connectors are typically used at each of the four corners of glass cube merchandisers.