Sash jammers for upvc doors: These window locks are designed for UPVC windows and doors, effectively limiting opening distance to deter intruders, providing reliable door security and added protection for ground floor windows, patio doors, and vulnerable access points. Easy Installation Design: The Window Sash Jammers come complete with screws and base packers, allowing quick installation with basic tools, no professional skills required, making these window locks for upvc windows ideal for everyday home upgrades and security improvements. Window locks child safety: By restricting window and door movement, these window locks child safety solutions help prevent accidental openings, offering parents peace of mind while still allowing controlled ventilation when used as sash window locks. Durable Plastic Construction: Made from high quality plastic, this door lock offers reliable strength for daily use while remaining lightweight and discreet, blending naturally with modern UPVC frames and performing consistently as a dependable Sash Jammer Blocker. Wide Application Use: Suitable for windows, patio doors, and secondary access points, these sash jammers for upvc doors function as a practical door jammer and patio door security lock for homes, flats, offices, and rental properties., Manufacturer: Cateye