• Required to install Kuryakyn's Iso-Boards [Part number 7907], Kuryakyn's Passenger Constellation Boards [Part number 4458], Kuryakyn's Swingwing Pegs [Part number 4467], or any other Kuryakyn product that says SPLINED adapters are required
• Unlike regular adapters, the "splined" effect keeps the boards firmly in place
• Sold as a pair
