Offers excellent protection against all common forms of attack including force, drilling, manipulation and hacksaw. Tested and certified to BS3621:1980 for Thief Resistant Locks, the 5 lever mechanism generates in excess of 1,000 key variations and is suitable for securing both domestic and industrial/commercial main entrance doors. Two case sizes, 67mm or 80mm, are available and are supplied with either satin or brass finish face and key plates.