Can Be Locked & Unlocked as Required --- When the Cable is In Place, the Distance of the Window can Open is Limited. And the Window can be Opened Fully after the Cable Being Removed from One End by Using the Key.
Security --- It Limits the Distance a Window can Open, Ideal for Home, Public and Commercial Safety, Also Designed Specifically for Children 's Safety.
Wide Application --- Suitable for Most Types of Windows and Small Doors, Suitable for Many Kind of Materials Such As UPVC, Wood, Aluminum and Metal.
Plastic--- Make of High-quality Plastic, Able to Withstand Greater Pressure, not Easy to Damage.