CIPA's Custom Towing Mirrors are durable, aerodynamic, and sleeve fitted to your vehicles exact specifications. No tools are required, and no marks or holes are left behind. The mirror slides over existing mirror with wedge lock security with a custom design that ensures a perfect fit and no annoying vibration. Does not obstruct existing mirror. Designed for use with 2019-2025 Chevrolet Silverado/GMC Sierra trucks.