Additional window lock FOS550

  • Two-point locking for inward opening windows and patio doors
  • Modular construction system up to 3.10 m, if handle is centred on the frame
  • Also for double windows with or without a rebate, with 7 mm square bolt
  • Dead bolting with quality push-button cylinder
  • Unlocking with the key only necessary after dead bolting
  • Can be supplied keyed alike with a variety of other ABUS products
  • Suitable for all surface materials, such as wood, PVC and aluminium
  • Universal DIN-right and DIN-left mounting

Additional window lock FOS550


  • VdS and DIN-certified
  • Resists more than one ton static load per securing point
  • Two locking points (top and bottom)
  • The system and the window is locked by the window handle
  • Appropriate bar sets have to be ordered separately
  • Incl. two keys


  • Finishes: B, W
  • Length of bars: 75 cm / 118 cm / 150 cm
  • Accessories: Floor strike plate BSB550, strike plate for double casement windows DSB550 B/W, ground socket BH550
  • Alarmed version also available

Questions & answers

Security glossary