The Planted Reinforcement Plate is used to reinforce a bolt or eye-bolt mounting point and is recommended when installing a harness in a non-factory location. Reinforcing a harness mount point is essential when the location has not been engineered by the auto manufacturer. Any time you mount a harness to sheet metal, you will need to put a reinforcement plate under it to keep it from ripping out of the floor. The Planted Reinforcement Plate uses a 7/16" - 20 nut welded to a 1/8th Inch thick piece of steel measuring 2 inches x 3 inches and then powder coated black. More information can be found on our website at and can be purchased via our eBay store here: +PRP