“Drill through” rimless eyewear are scary to adjust. If you don’t solidly support the screw/fixture/nut assembly when adjusting the temple or bridge, the lens will crack. With this plier you can fearlessly adjust a screw and nut rimless. Our Delrin plastic jaw has a channel that holds the screw head. The opposing slotted metal jaw securely grips the retaining nut. With the mounting fixture held firmly, you can safely, but cautiously, make your adjustments.