Review on Boao 4-Pack Car Sun Visor Glasses Holders, Sunglasses Holder Clip Hanger Eyeglasses Mount, 180 Degree Rotational Double-Ends Clip Car Glasses Holder (Gold) by Dangelo Toliver

This has the advantage that it holds 2 glasses. They seem relatively sturdy (I've dropped them a few times and none have broken). As you can see from the photos, it can also be "flipped" to hold the glasses straight or to the side, which was an unexpected benefit. doesn't have enough tension so it either constantly knocks off when you hit/touch it, or it falls off when you move/use the sight. Also the part where you clamp the glasses is a bit tricky to operate - this is NOT one handed operation. I have to take both hands off the wheel to put my glasses in, although they can be pulled out with one hand. Bottom line, I wouldn't buy it again. There is simply no function.