Glasses and Sunglasses Repair Kit standard: They are measured according to thread size, shaft diameter and length, with the thread size listed first, then the shaft diameter and finally the length. For example, a screw with a thread size of 2.5 mm, a shaft diameter of 1.4 mm, and a length of 8.0 mm would be listed as such: 2.5 x 1.4 x 8.0. The majority of frames require screws that are 1.4 mm in diameter, with some thinner wire frames using 1.2 mm screws. If the screw is lost, replace it with one of the screws from the kit, If the repair kit's screw does not fit into the hole, do not force it, as that might strip the threads inside the frame. Replace screws or nose pads:Find the Suitable screw or nose pads from the repair kit that fits in the hinge. Turn and tighten the screw inside the hinge. If the new screw is not a perfect fit or the existing screws come loose frequently, Apply a dab of clear nail polish onto the screws. Do not use fast-bonding glue to hold your lenses in place. It will make it impossible to remove them in the future. Screw handling: In order to more easily handle and insert screws, We are equipped with tweezers; Tweezers engraved tail groove, can tightly grip the screw, Will aid in visibility when inserting the screw and leaves enough a point to allow for easily manipulating the screw around the barrels. Application range: Can be used to repair screws for eyeglasses, sunglasses, watches, cellphones and other precise devices. After-sales service: If the repair kit's all screw does not fit into,you can return it in accordance with Amazon's return policy ; we are provide for trustworthy money back guarantee, no risk. For further assistance,please contact us.transparent plastic grommets:transparent plastic grommets are used only to make sure that the box is not accidentally opened
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