Adjustable Window Stopper Lock – Casement Sash Latch

Adjustable Window Stopper Lock – Casement & Sash Safety Latch

Keep your windows secure, ventilated, and under control with this compact Adjustable Window Stopper Lock. Made from durable carbon steel, this clever limiter latch lets you set the exact opening width of any casement or sliding sash window — so you always stay in charge of airflow, privacy, and home security.

Key Features

• Stable Limit & Wind Resistance: Restricts the window's sliding range to prevent it from being pushed fully open or accidentally sliding shut during strong gusts — keeping your home safer every day.
• Ventilation & Security Balance: Set your preferred opening width to enjoy fresh air while limiting the gap to deter unauthorized entry — a smart, low-profile security upgrade.
• Easy, No-Drill Installation: Attaches via adhesive or non-drilling screws, making it compatible with plastic steel, aluminum alloy, and most other window frame materials — no tools required.
• Finger & Frame Guard: Prevents windows from slamming violently against frames due to wind force, protecting both the window and curious little fingers — ideal for households with young children.
• Discreet, Compact Design: Low-profile form factor blends with most window frame colors, so it enhances safety without compromising your home's appearance.

Product Specifications

• Material: Carbon Steel
• Mount Type: Adhesive or Non-Drilling Screw
• Compatible Frames: Plastic Steel, Aluminum Alloy, and more
• Color: As shown
• Country of Origin: Made in China

What's in the Box

• 1 × Adjustable Window Stopper Lock Latch
• Mounting hardware (screws/adhesive as applicable)

Please allow a 2–3% tolerance due to manual measurement. Monitor color settings may cause slight variations in appearance.

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Frequently Asked Questions

Q: Is this window stopper lock compatible with aluminum window frames?

A: Yes! The adjustable window stopper lock is designed to work with multiple frame types, including aluminum alloy, plastic steel (uPVC), and other common window materials. Simply choose the adhesive or screw-mount method that works best for your surface.

Q: Can I adjust the window opening width after installation?

A: Absolutely. The latch is fully adjustable, allowing you to set your preferred opening limit at any time — whether you want just a small gap for ventilation or a wider opening for airflow while maintaining a safety barrier.

Q: Is this suitable for use on second-floor or higher windows?

A: Yes, this window stopper is especially useful on upper-floor windows, providing an added layer of security by limiting how far the window can be opened. It is particularly recommended for families with young children to prevent accidental falls.

Q: Does the window stopper lock require drilling into the window frame?

A: No drilling is required. The stopper can be installed using either a strong adhesive or non-drilling screws, preserving the integrity of your window frame while still providing a firm, reliable hold.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.