Abus 2520

Secure Middle Additional Lock for Double Wing Windows made of Aluminum, Wood, or Plastic with a Central Mullion. Regardless of whether they are made of aluminum, wood, or plastic, your double wing windows should always be secured against break-ins. This additional lock performs its job reliably, even in narrow installation conditions. The solid swivel bolt of the additional lock automatically engages; a key is only needed for opening. The lock is mounted directly on the frame, so the window sashes do not need to be drilled.