WINKHAUS STV-FGTE Master Lock 2 Hook 45mm Backset 20mm faceplateFGTE by Winkhaus is a double door locking system for composite, timber and aluminium doors. This STV FGTE is the master side, for the first opening leaf, with a 45mm backset latch and deadbolt gearbox and 2 hooks. It has 92mm centres and a 20mm faceplate. It can also be used with FGTE top and bottom shootbolts (available by special order). FGTE Master door lock used in first opening leaf of double doors Croppable faceplate 20mm throw central deadbolt