Crescent Moon Lock: The black T-shaped design is ergonomic, providing a secure grip. Turning it smoothly rotates the lock hook.

Lock Hook: The curved metal hook is the core locking component. Turning it engages with the lock seat on the window frame, locking the window.

Base: The black mounting base has pre-drilled holes for screw mounting to the window sash edge, accommodating sliding windows of different widths.

Core Functions:

Anti-theft Locking: Rotating the crescent lock engages the hook with the lock seat, restricting the sliding of the window sash and preventing unauthorized entry.

Windproof Positioning: The window sash can be fixed in any opening position, preventing it from sliding back and forth in the wind and improving security.

Wide Compatibility: The simple structure and flexible mounting holes allow it to fit most aluminum alloy and PVC sliding windows and doors.