HHB Harley Davidson Sprocket Lock System - AluminumHHB Sprocket Pulley Lock System for Harley DavidsonRaw Aluminum (Silver) Finish Stop the dangerous problem of loosening pulley or sprocket fasteners on your Sportster, Big Twin, or tube frame Buell motorcycle with the genuine Hughs Hand Built Sprocket Lock System. This kit is designed to work on nearly all 1973 and newer Harley Davidson XL, Big Twin, and Buell motorcycles that use a 5 bolt pattern on the rear wheel. This solution is 100% bolt on,