4 hinge screw sizes to fit most frames. The Flents Eyewear Repair Kit Contains: 1 optical screwdriver, 1 screw starter, 1 magnifier, 2 metric hinge screws (1.6 mm, 1.4 mm), 2 American Standard hinge screws (7-barrel, 5-barrel), 1 case. Optical screwdriver. Magnifier. Screw starter. Eyeglasses hinge.