Simple design lowers the rear of factory Dyna models by 1 in Machined from 6061-T6 billet aluminum and then black powered coated to match the factory swingarm finish Each kit includes a pair of lowering blocks and all necessary hardware This product can be used with Model Part# Harley-Davidson Dyna models 90-05 SKHD-1 Harley-Davidson Sportster models 89-03 SKHD-2