Zoo Hardware Vier DIN Night Latch Finish: Satin Stainless Steel Choice Of Square Or Radius (Rounded Edges) Forend & Strike Plates Tested to BS EN 12209 : 2003 & Certifire tested - CF850 Dimensions -Case size (55mm backset) - 85mm x 165mm -Case size (60mm backset) - 90mm x 165mm -Face plate - 235mm x 22mm x 3mm Grade 304 Stainless Steel latch bolt Includes grip tight follower spring Includes anti-thrust pin and dust box All factory QC tested 10 year mechanical guarantee