Abstract: An implement for loosening stuck connection elements includes a striker hammer with a connecting portion for connection to a percussion tool at one end, and a striking surface for imparting an impulsive stress at the other end; a counteracting body opposing the striker and having an abutment surface that faces towards the striking surface; a retainer for retaining the striker to the counteracting body, while keeping a predetermined minimum distance between the striking surface and the abutment surface (8), so adapted to accommodate at least one of the elements of a pair to be loosened. A combination of the implement with a percussion tool and/or a wrench.