This fender is manufactured in 16 gauge steel. It has one-piece formed construction for added strength. Unlike the more usual "two halves welded together", this fender won't flex and split. The steel fender has been phosphate etched to help to prevent corrosion and to give a good surface for primers to adhere to. For custom installations the fenders are raw and not pre-drilled. Fits Harley Davidsons as well as any custom applications.