CIPA Custom Towing Mirrors are designed to fit over standard factory rearview side mirrors. The CIPA Custom Towing Mirror is durable, aerodynamic, and sleeve-fitted to your vehicle's specifications. These mirrors will slide snugly over your vehicle's existing rearview side mirror and features an additional adjustable mirror on the outboard end that extends your towing vision without obstructing your existing vehicle mirror. No tools are required and no marks or holes are left on your vehicle. The CIPA Towing Mirrors and installation knobs are made with durable ABS plastic known for its strength, rigidity, and unbreakable security. The mirror face is made with scratch-resistant glass for years of unobstructed towing use.• Slides over existing mirror with wedge lock security• Custom design ensures a perfect fit and no annoying vibration• Easy installation with no tools required• Does not obstruct existing mirror• Sleek custom design complements the existing mirror• Fit 2004-2014 Ford F-150, F-250 Light Duty; 2004-2014 Ford F-150, F-250 XLT models Additional adjustable mirror on the outboard end extends towing vision No tools required & no marks or holes are left on your vehicle Installation knobs made of durable ABS & mirror face of scratch-resistant glass | CIPA 11800 Custom Towing Mirrors, 2004-2014 Ford F-150, F-250, Pair | ABS Plastic