ScreenLock allows compatible cable window restrictors to pass through an insect screen without removing the screen. Enjoy fresh air, insect protection and window safety—all at the same time.
 
The existing insect screen remains in place.
Two precision discs (one on each side of the screen) clamp together using four small screws.
The center of the discs contains a 25 mm opening.
After the discs are installed, the mesh inside the opening is cut away.
The window lock cable passes cleanly through the opening.
The insect screen continues to keep bugs out while allowing the window safety cable to pass through without damaging the rest of the screen.