If your car does not have a rollcage, you can use these kits to install your Wink mirror to your windshield. Each kit bonds an adjustable mirror stem directly to the windshield glass (similar to an OEM rearview mirror in a street car). The threaded stud fits the threaded inserts in the back of Wink mirrors. Sold individually. Two kits are required for 4 and 5 panel Wink Mirrors.