Using Pig Ears instead of double or swivel couplers save you time and money. They are lighter in weight and only have one securing bolt. Pig Ears are a used for connecting tube at 90 degrees and are ideal for constructing pipe grids. Being lighter, they are easier and quicker to use and cost less to ship! The single bolt design means they are easier and faster to install. Also known as Wrapovers, Single Coupler, or Putlog Coupler. Whatever you choose to call them, they save you time and money!