The GARALOK locking bolts are fixed to the inside of the garage door and are key operated from both inside and outside the door by a 7 or 9 pin lock (Most UK. pin locks have 5 pins). When locked an 18mm (¾ inch) square section hardened steel bolt 79 mm long (over 3 inches) is inserted into a socket set in the good quality concrete inside the garage. Alternatively, it can be set to go sideways into garage door frame. GARALOK as well as providing flexible fixing for their locking bolts, also provide a range of special fixings to accommodate the various types of manufacturer's garage doors.