The mortise lock ES 920 Ö with a euro profile cylinder hole and latch lever function is ideal for rebated interior doors as well as apartment entrance doors. The faceplate is galvanised and rounded so that the mortise lock can be easily installed in a wide variety of fire doors. The lock enables screw-on fittings and rosette fittings to be fitted easily and is made in accordance with the Austrian standard B 5350. In addition, the enclosed lock case prevents dirt from entering the mechanism.