U.S. Patent # Des 338,643 - The unbelievable comfort of Stirrup Heelrests is now available for Metric Cruisers - This adjustable height heelrest allows footboard like support to reduce fatigue on longer rides - Sold as a pair For Use With: Large ISO-Pegs, Dually ISO-Pegs and Retro Pegs Chrome Inserts are available to finish off the Stirrup backs: [Part Number 8058]