Match the 4.5 mm Monalisa screw to the existing side-joint fitting, align the frame joint, and tighten with the compatible screwdriver until secure without over-tightening.
When to use
Use for compatible 4.5 mm side-joint screw replacement on acetate spectacle frames and sunglasses.
Where to use
Use on compatible acetate-frame and sunglass side joints where a 4.5 mm Monalisa screw matches the original fitting.
