Fit System K-Source 80910 Towing Mirror Chevy/Gmc Pair Custom fit towing mirrors snap over your vehicle's existing mirror to give you added vision while towing This set of Snap-On towing mirrors will snap on and off easily to existing mirror We've engineered these OE fit Snap-On mirror to conform to the factory model an style Will not block vision of your original mirror and can still be folded away with the Snap-On towing mirror on Easy installation and instructions included.Clip on mounting system