Screw-on escape door opener with latch counterpart, holding force max. 3,000 N, unlocking under preload at 100% of the holding force, feedback contact potential-free and anchor contact potential-bound, low power consumption, easy installation, installation on hinge side and opposite hinge side possible, installation on glass doors with additional adhesive plate and adhesive set possible, horizontal adjustment option on the door opener and with optional L-angle, vertical adjustment option on the latch counterpart, narrow housing