2piece set of rectangular convex blindspot mirrors for car rearview mirrors 360degree rotation and swingadjustable wideangle viewing to maximize the field of vision Adjustable swivel mounting brackets on each mirror for easy installation on your existing rearview mirror definition convex mirrors provide clear peripheral visibility to reduce blind spots Compact rectangular design with a convex surface for wider viewing without obstructing your primary view Designed for car use; attaches to the existing rearview mirror with the included swivel brackets Safety benefits: helps reduce accidents during lane changes, merging, highway driving, and parking in tight spaces Use scenarios: Lane changes on multilane highways where quick peripheral checks are needed Merging onto freeways with limited visibility in the blind spot Parking in tight spots or crowded lots where side clearance is restricted Package includes 2 mirrors