Spring loaded Hinges.
Quality Plastic Reading Glasses +1.0~+3.5 Spring Hinges Classic Black Arms L876
New Quality Plastic Reading Glasses*Multi Style*Fashion & Comfort Designed *
Quality Plastic Reading Glasses Spring Hinge Arms Mens Womens Classic Frame R176
Superb Quality Plastic Reading Glasses Spring Hinges Colorful Tortoiseshell R882
Good Quality Big Lens Simple Plain Plastic Reading Glasses Comfort Designed 140
S140 High Quality Big Lens Simple Plain Plastic Reading Glasses/Comfort Designed
