This child safety window restrictor is designed to limit window opening to under 100mm, helping prevent accidents while maintaining ventilation. Suitable for uPVC, aluminium, wooden, and metal frames, it features a strong 20cm cable and a lockable mechanism that allows full window opening when needed. Built to withstand forces over 100kg—double the industry standard—it exceeds EN 16281 strength requirements for peace of mind. Includes key and fixings for easy installation. Product Details: Restrictor length: 20cm Opening limit: Less than 100mm Strength: Resists forces over 100kg (980Nm) Compatibility: uPVC, aluminium, wood and metal windows/doors Locking: Lockable unit with 1 key included (spare keys available) Standards: Exceeds EN 16281 safety requirements Installation: Supplied with 4 self-drilling screw