Screw‑Fixed Extruded Aluminium Corner Joint with Plastic Button (L×10.4)

The aluminum under‑plastic button fixer (L×10.4) is designed to reinforce internal 45° mitered corners in aluminum doors and windows. Installed inside the profile channel and locked with a plastic mechanism, it stabilizes the 90° joint, improves rigidity, and prevents corner looseness. Ideal for profiles with limited internal space.