Works with Sentinel, Star Series and Trail Star handguards. Convert to a closed handguard. T6061 aluminum brackets. Curved end for better ergonomics. Steel expander inserts for securing to aluminum handlebars. Includes all mounting hardware. Includes hardware for steel bar mounting. Provides increased protection for all types of riding. Helps protect levers and controls. This is not a substitute for the mount kit.. Some solid handle bars may require drilling and tapping..