a screw lid opener is disclosed which can be converted in an extremely simple manner from one lid radius to another with a screw lid opener having a lever - like handle with a clamping device thereon for holding a screw lid , the lid radius is set by three clamping cheeks for clamping on a screw lid . the clamping jaws are arranged at a distance from a center between the clamping jaws . in accordance with exemplary embodiments , at least one clamping jaw , whose distance from the center can be changed , is provided . this permits the conversion from one lid radius to another . advantageously all three clamping jaws are embodied to be movable in the same way . with the same spectrum at various radii of lids , this results in a shorter travel for the individual clamping jaw .