Din Euro Sash Lock with 72mm lock centres and a backset of 60mm. Conforming to BS EN 12209 2003 : Grade 3 it has a 90mm case size, 60mm backset and a Square profile with 22mm Grade 304 stainless steel forend, Grade 304 stainless steel latchbolt & deadbolt, Double throw deadbolt. It has an Anti-rattle strike and a Grip tight follower.