2-Pack Window Sash Jammer Locks - 165mm, Aluminum Alloy Security Locks For UPVC/PVC Casement Windows & Doors

Want a little extra security and peace of mind for your home, especially with kids or pets? These simple window jammers are a brilliant solution. You get two in the pack. They're made from sturdy aluminum alloy and install in seconds on most casement windows (the kind that swing open like a door, both inward and outward opening). Just screw one part to the window frame and the other to the sash. Once locked, they let you open the window a crack for ventilation but prevent it from opening any further. This stops kids from opening it too wide, helps prevent break-ins, and keeps the window from banging in the wind. The 165mm length gives you a good range of adjustment. They're also great for patio doors. No complex tools needed – just a screwdriver. A cheap, effective upgrade for home safety and comfort.