The RAP-299-2 Vehicle Cup Holder Base is designed to hold your electronic device in an accessible location when you don't want to attach anything to your windshield or dash - as long as you have a cup holder. Simply slide the base into a spare cup holder in your vehicle, and you are ready to go.The mount includes a solid plastic composite tube base with customizable support fins connected to a 6 inch flex arm with a plastic diamond plate end.This mount will connect to any of the RAM plastic cradles (RAM-HOL series). Some phone holders will also connect to the diamond plate hole spacing.