A real alternative to all other opening techniques with closed doors. It is used for barrier free doors, even Schallex and Kältefeind doors. Can also be used in case of panic and self-locking locks. Inserted in the gap between door and floor, it is lifted up and adjusted over the door handle. The pull rope on the outside is then used to pull the handle down. A spare steel-cord is located in the handle. We recommend the 3mm version as this version can be used with smaller gaps.