The fire-resistant mortise door lock ES 984 with panic function is intended for use in fire-resistant doors. The faceplate is galvanised and rounded, allowing the mortise lock to be installed in a wide variety of fire doors. The bolt and latch are centrally positioned in the lock. In addition, the fire-resistant lock features a panic function with a handle and knob so that the locked door can be opened from either side at any time. The mortise lock can be used with DIN right-hinged and DIN left-hinged doors and screw-on fittings and rosette fittings can be fitted easily thanks to the DIN-standardised holes in the lock.