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 (15, 16), wherein the cantilever member extends between the first and second side surfaces (15, 16), 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 (15, 16), 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 (22, 23) are parallel or substantially parallel, wherein the cantilever beam is arranged parallel or substantially parallel to the top and bottom surfaces (22, 23), 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 (15, 16), wherein the cantilever member extends between the first and second side surfaces (15, 16), 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 (15, 16), 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 (22, 23) are parallel or substantially parallel, wherein the cantilever beam is arranged parallel or substantially parallel to the top and bottom surfaces (22, 23), 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.