• Swivel base allows the seat to rotate 360 degrees
• Two hot-forged aluminum plates
• Two aluminum plates have holes in the bolt pattern for the NRS Low-Back and High-Back Seats
• Use the bolts you have with your seat to attach it to the aluminum plates
• Older seat bars that don't have holes, just drill four 1/4 inch holes in 5.25-inch x 5.25-inch pattern