Window Blocker (Fensterblocker) – secure, reliable protection for home use with a sliding door bar. Works as a window stopper lock to help prevent unauthorized opening and provide peace of mind. Window Lock (Fensterschloss) – robust and reliable, designed for windproof hold and precise positioning of sliding windows. A sturdy sash lock that helps secure openings without adding complexity. Sash Window Lock (Flügelfensterschloss) – built to resist deformation or breakage, offering long service life. A durable sliding window lock that maintains security over time. Window Stopper (Fensterstopper) – versatile for a variety of windows and doors, meeting your security needs. Simple to install and use as a reliable window lock. Use scenarios - Secure a ground-floor patio door at night or when away from home to deter unwanted entry. - Vent a window slightly during mild weather while maintaining a secure opening. - Improve safety in homes with children by limiting how far windows can open.