The bs84' abus additional window lock is the ideal solution to enable doors to be lifted. it locks the handle and thus effectively protects the window door from outside attacks. you have to fix the hinge side separately. the additional lock is also suitable as a parental control, as it can only be opened with a key. the fuse is only locked by pressing. the bs84 is only mounted on the window belt. there is a key for several locks to lock the handle at the same time as theft protection and child protection for lifting and lifting doors made of aluminum, wood or plastic by locking the handle, the lift door is effectively protected from being opened from the outside Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.