Uses the same hardware and wrench as the rest of the grid system. 1/2" hole in top for shackles.Minimum Size: 1.5" Pipe, 1.9" OD PipeMaximum Size: 2" OD PipeWLL: 1250 poundsHardware:1"x 5/16" socket head cap bolt5/16" zinc plated nylon hexboltDimensions5.5" tall x 2" wide x 1/4" thickWeight.55 pounds