5 Lever British Standard CE Sashlock - Stainless Steel - Satin 78mm case / 57mm backsetA high security mortice lock for use in interior and exterior doors in commercial and domestic environments. The lock has been rigorously tested to BS 3621: 2007 which is a common requirement of building and contents insurance policies. The heavy duty spring mechanism makes this lock ideal for sprung and unsprung door handles. Tested to BS 3621: 2007 Anti drill protection High security, insurance approved Easily reversible latch bolt Tested &