The Yale 8K108 economy window lock is surface fixed to the window. It is key lockable and suitable for hinged timber casement windows. This enamel coated, easy fitting window lock gives additional security to your home and is a cost-effective way of improving your safety and protecting your family inside the your property. Simple, effective security that anybody can install giving you that additional level of security for the ultimate peace of mind. Box Contains 1 x Yale YALV8K1184WE economy window locks