a front end and a rear end between which a centre axis and a peripheral envelope surface extend, the tool body being configured to be rotated in a direction of rotation around the centre axis;

at least one insert seat formed in a transition between the front end and the peripheral envelope surface, wherein the insert seat is configured to support a cutting insert arranged to be mounted therein;

a chip pocket provided in front of the insert seat in the direction of rotation, wherein the chip pocket is delimited by a wall surface; and

a surface pattern included in the wall surface of the chip pocket, the surface pattern including a plurality of first concavely curved grooves forming a ridge extending along at least two neighbouring first concavely curved grooves and a plurality of second concavely curved grooves formed at the ridge of the at least two first concavely curved grooves,

wherein each of the first concavely curved grooves extends along a first length extension direction and each of the plurality of second concavely curved grooves extends along a second length extension direction, different from the first length extension direction, such that the plurality of second concavely curved grooves intersect the plurality of first concavely curved grooves,

wherein each groove of the plurality of first concavely curved grooves and each groove of the plurality of second concavely curved grooves has a concave groove profile, and

wherein the concave groove profile is arc shaped.