A cutting tool for metal cutting, comprising a tool body , wherein a recess is formed in the tool body , wherein the tool body comprises vibration damping means , the vibration damping means comprising a cantilever member , in that the cantilever member is adjacent to the recess , in that the cantilever member comprises a cantilever beam and an end mass , in that the cantilever member extends between a fixed end and a free end , in that the fixed end is permanently connected to the tool body , in that the cantilever beam extends from the fixed end , and in that the end mass extends from the free end , wherein the tool body comprises a first side surface and an opposite second side surface , wherein the recess opens into the first and second side surfaces , wherein the cantilever member extends between the first and second side surfaces , wherein the tool body comprises an insert seat and a cutting insert positioned in the insert seat , wherein the cutting insert comprises a cutting edge , wherein the cutting edge defines an insert width , wherein the insert width is greater than a distance between the first and second side surfaces , characterised in that the cutting tool is a grooving blade, wherein the grooving blade comprises a front-end surface , a top surface and a bottom surface , wherein the insert seat opens into the front-end surface , wherein the top and bottom surfaces are parallel or substantially parallel, wherein the cantilever beam is arranged parallel or substantially parallel to the top and bottom surfaces , wherein a distance from the front-end surface to the free end is shorter than a distance from the front-end surface to the fixed end . wherein a recess is formed in the tool body , wherein the tool body comprises vibration damping means , the vibration damping means comprising a cantilever member , in that the cantilever member is adjacent to the recess , in that the cantilever member comprises a cantilever beam and an end mass , in that the cantilever member extends between a fixed end and a free end , in that the fixed end is permanently connected to the tool body , in that the cantilever beam extends from the fixed end , and in that the end mass extends from the free end , wherein the tool body comprises a first side surface and an opposite second side surface , wherein the recess opens into the first and second side surfaces , wherein the cantilever member extends between the first and second side surfaces , wherein the tool body comprises an insert seat and a cutting insert positioned in the insert seat , wherein the cutting insert comprises a cutting edge , wherein the cutting edge defines an insert width , wherein the insert width is greater than a distance between the first and second side surfaces , characterised in that the cutting tool is a grooving blade, wherein the grooving blade comprises a front-end surface , a top surface and a bottom surface , wherein the insert seat opens into the front-end surface , wherein the top and bottom surfaces are parallel or substantially parallel, wherein the cantilever beam is arranged parallel or substantially parallel to the top and bottom surfaces , wherein a distance from the front-end surface to the free end is shorter than a distance from the front-end surface to the fixed end . <EOS>