Kuryakyn 4357 Ribbed Driver/Passenger Floorboard Style, quality, function, and adjustability at a price that can&#39;t be beat. Switching to floorboards just got easier and with five thoughtfully placed splined mounts, these boards can be fine tuned just right for the rider or passenger.Ribbed floorboards for driver or passenger.Featuring a wrinkle black finished base.Dimensions: When installing any footpeg, footboard or highway peg combination, always verify all fasteners are tight and secure - even those you don&#39;t adjust. It is also recommended to periodically check to make sure all fasteners remain tight. Harley-Davidson&#174; fitment: Male mount requires Kuryakyn Non-Pivoting Splined Adapters (P/N 8883; sold separately).