National Cycle Heavy Duty Windshields are fixed-mount motorcycle windshields that use an Allen key for removal. This classic style with an adjustable center window allows fitment to a long legacy of models dating back to the 1949 Harley-Davidson FL. Only National Cycle Heavy Duty windshields can fit a long legacy of older motorcycles as well as the newest cruisers.Heavy Duty Narrow Frame windshields feature the same quality construction as the Heavy Duty Wide Frame shields, but are designed with a vertical strap spacing of 10.75" for a great fit on cruisers with either wide or narrow forks. All Heavy Duty windshield frames feature highly polished chrome steel outer hardware with non-glare black epoxy coated steel inner straps. The Heavy Duty Ranger Narrow Frame.