There are many different security fixings and pictures of some of these covering:-
ANTI LIFT DEVICES FOR PATIO DOORS
CHAIN - DIFFERENT QUALITIES AND LENGTHS
DOOR CHAINS AND BAR
DOOR VIEWERS
HINGE BOLTS
MULTI PURPOSE BOLTS - VARIOUS TYPES
PATIO DOOR ADDITIONAL SECURITY LOCKS
SECURITY BOLTS FOR DOOR AND WINDOWS
WINDOW LOCKS OF VARIOUS TYPES FOR SECURING WOOD, UPVC AND METAL WINDOWS