FUHR 856-4 Four-Hook uPVC Door Multipoint Lock

The Type-4 FUHR 856 offers four hookbolts, operated by means of the handles used on the door.  These four hooks are evenly distributed above and below the centre gearbox; with two at the top and two at the bottom of the locking strip.  The centre gearbox then provides your standard latch & deadbolt setup.

With straight-spindle operation, these are designed to work the same whether or not you're inside the property or outside.  Lifting the handle will engage all of the hooks and the central deadbolt, then a turn of the key in your euro cylinder will lock these all in place until the key is used to unlock the gearbox and allow the handle to retract the hooks back. 

Set on a 16mm faceplate (or 'rail') and with a 35mm backset, these are most widely used on uPVC doors but can be (and sometimes are ) also used on modern timber and composite doors.