Strong Magnet: The car sunglasses holder is equipped with a powerful magnet that securely holds your sunglasses in place, preventing them from slipping or falling. It's a practical accessory designed to store not only glasses and a card, but also masks, bills, etc... Easy Installation and One-Hand Operation: The glasses clip easily attaches to your sun visor with a simple buckle. Its one-hand operation allows you to quickly secure and retrieve your glasses with a flick of the wrist, eliminating the need to search for them while driving. Glasses and Card Holder: This visor clip offers dual functionality, holding both a pair of glasses and a card. Its compact design helps you stay organized without taking up extra space, adding convenience to your daily drive. Fits Most Glasses: Compatible with most eyewear, including thicker frames. For thick-legged sunglasses, use the inner elastic strap; for thinner frames, place them in the center. Not suitable for eyeglasses with temple thickness exceeding 0.19 inches. Important Note: If the holder isn’t securely gripping your glasses—especially those with thicker temples—adjust the placement slightly and press the temples against the elastic strap for a tighter hold. This product does not work with sports frames that do not fold flat. Should you experience any issues, feel free to contact us for assistance. We're committed to providing excellent customer service.