Turning insert for metal cutting

A turning insert comprising:

• a top surface;
• an opposite bottom surface;
• a reference plane extending between the top and bottom surfaces;
• a center axis intersecting the top and bottom surfaces;
• a side surface connecting the top surface and the bottom surface;
• and
• a cutting edge adjacent to the top surface and the side surface, the cutting edge being circular and concentric in relation to the center axis, wherein the bottom surface includes a set of radial grooves, wherein the bottom surface includes a set of flat surfaces, wherein the flat surfaces extend in a plane parallel to the reference plane, wherein the top surface comprises includes a set of first protrusions, wherein a greatest distance from the reference plane to the first protrusions is greater than a distance from the reference plane to the cutting edge, wherein in a top view each first protrusion is symmetrical in relation to a line extending between the center axis and a mid-point of the first protrusion, and wherein the first protrusions are elongated in a direction parallel to the adjacent cutting edge.