EASY ASSEMBLY: Beveled edges can easily be screwed to the sides using a Phillips screwdriver and the included wingnuts and screws so it's ready in no time BUILT TO LAST: Made of powder-coated steel plates to keep your garden bed looking its best for years to come OPEN BASE DRAINAGE: Built with an open base to prevent water buildup and breakdown, while allowing roots easy access to nutrients MICRO-ENVIRONMENT: Steel panels prevent the invasion of excessive nitrates and soil leaching, so you can create the ideal conditions for your plants to grow IDEAL FOR VARIOUS PLANTS: Spacious 18-square-foot frames are raised nearly a foot off the ground to provide a healthy environment for vegetables, herbs, flowers, succulents, and more!