For those who don't want to go through the hassle of making their own adapter plates to mount or seats to factory rails AND/OR those who would like to mount our seats using the universal sliders they come with so you can SIT LOWER and slide the seats FURTHER BACK than stock. They are waterjet cut and then hand welded for a perfect fit. Holes in the top of the bracket are designed to access the bolts to make installation as easy as possible.