Penkid window restrictor lock is suitable for window and doors including wooden pvc aluminium and metal profiles the window lock is perfect for home safety and has been designed to prevent any accidents from happening such as young children falling out of open windows and doors the penkid steel wire rope can endure a force of up to 550kg force and is also ce marked for added assurance supplied with a key the penkid allows the window or door to be opened when necessary and once closed it