6-step stainless steel window opening limiter for aluminum and PVC frames

Settings: Made of zinc alloy and stainless steel, this window stopper features 6 customizable locking positions, allowing you to securely hold your window open from 0 to 120°. The design effectively prevents accidental slamming during strong winds, providing a safe and comfortable home environment. Secure Rotary Locking Mechanism: The innovative rotary knob safety lock offers three times the holding power of standard clips. Its unique design prevents accidental release while allowing easy one-handed operation, making ventilation adjustment simple yet secure for everyday use. Storm-Resistant Construction: Constructed with stainless steel components, this window restrictor withstands high winds without deformation. With reinforced pivot points and anti-slip pads, it delivers reliable performance even in extreme weather conditions, protecting your windows year-round. Versatile Compatibility: With two installation options to fit various window types. Whether you have flat-based models for