Euro Lever Handle Set – Round Rose on Square – Cylinder Hole In & Out – 212mm – Satin Chrome

Measure three things on the lock you are replacing: the faceplate length, the backset from the faceplate to the centre of the cylinder hole, and the pitch between the lever spindle and the cylinder. The EC30 has a 240 mm faceplate, 30 mm backset and 85 mm pitch. The AR30 has a 210 mm faceplate, 30 mm backset and 85 mm pitch.

No. The Euro mortice locks take a separate Euro profile cylinder, so you can choose key-and-key or key-and-thumbturn and the length that suits your door. This range has 65 mm 5-pin and 70 mm 6-pin C4 Euro cylinders, each in key-and-key and key-and-thumbturn versions, plus lever sets and escutcheons to finish the door.

Measure the cylinder from end to end, then the distance from each end to the centre of the fixing screw hole, because that tells you how far it sits out on each side of the door. The 65 mm and 70 mm lengths are nominal: the barrel sits 1.5 mm (65 mm) or 2.0 mm (70 mm) proud at each end.