The mortise lock for interior doors ES 921 with warded keyhole is designed for internal rebated doors. The angular faceplate is nickel-silver coated and has a high-quality appearance. The lock also enables screw-on fittings and rosette fittings to be fitted easily thanks to the standardised holes in accordance with DIN 18251-1 (Class 1). The enclosed lock case protects the mechanism from dirt. Doors can also be closed especially quietly thanks to the plastic latch and bolt.