Description: Easy do-it-yourself installation. When you haul sand, gravel, soil or mulch, this kit is perfect to help keep it from getting between the drop-in bedliner and bed. Simply remove any equipment attached to the standard interface plates and then fill the access holes with these plugs. when done, remove the plugs and reattach equipment. Constructed of durable, weather-resistant, black synthetic rubber. Includes 4 cleat plugs, 2 lighting plugs, plus instructions. Bedliner - Drop In, Upper Plug Kit for Cutout.