A well tool system for performing an operation in an oil/gas well, the well tool system comprising: a well tool; a bore comprising a guide groove in an inner surface of the bore; wherein the well tool is insertable into the bore and wherein the well tool comprises: - a mandrel having a longitudinal direction ( I - I) and a radial direction perpendicular to the longitudinal direction ( I-I); - an orientation system for longitudinal and rotational orientation of the well tool with respect to the bore; - the well tool further comprises an outer housing arranged radially outside the mandrel; - the orientation system comprises: - a radial opening provided in the outer housing; characterized in that 5I - a finger sleeve comprising a longitudinally extending resilient finger with a distal part and a proximal part (123") connected to the finger sleeve; wherein the finger sleeve is arranged radially between the mandrel and the outer housing; wherein the distal part comprises a first wedge-shaped portion and a second wedge-shaped portion both extending in the outwards radial direction and tapering away from each other in the longitudinal direction ( I-I); wherein the orientation system has an initial state in which the first wedge-shaped portion protrudes radially through the radial opening of the outer housing and is configured to engage the guide groove; wherein the first wedge-shaped portion is configured to be longitudinally and rotationally guided in the guide groove when the well tool is moved longitudinally; wherein the well tool is configured to rotate with the first wedge-shaped portion; wherein the orientation system has a subsequent state in which the first wedge-shaped portion is radially retracted in the radial opening of the outer housing. a well tool; a bore comprising a guide groove in an inner surface of the bore; wherein the well tool is insertable into the bore and wherein the well tool comprises: - a mandrel having a longitudinal direction ( I - I) and a radial direction perpendicular to the longitudinal direction ( I-I); - an orientation system for longitudinal and rotational orientation of the well tool with respect to the bore; - the well tool further comprises an outer housing arranged radially outside the mandrel; - the orientation system comprises: - a radial opening provided in the outer housing; - a mandrel having a longitudinal direction ( I - I) and a radial direction perpendicular to the longitudinal direction ( I-I); - an orientation system for longitudinal and rotational orientation of the well tool with respect to the bore; - the well tool further comprises an outer housing arranged radially outside the mandrel; - the orientation system comprises: - a radial opening provided in the outer housing; characterized in that 5I - a finger sleeve comprising a longitudinally extending resilient finger with a distal part and a proximal part (123") connected to the finger sleeve; wherein the finger sleeve is arranged radially between the mandrel and the outer housing; - a finger sleeve comprising a longitudinally extending resilient finger with a distal part and a proximal part (123") connected to the finger sleeve; wherein the finger sleeve is arranged radially between the mandrel and the outer housing; wherein the distal part comprises a first wedge-shaped portion and a second wedge-shaped portion both extending in the outwards radial direction and tapering away from each other in the longitudinal direction ( I-I); wherein the orientation system has an initial state in which the first wedge-shaped portion protrudes radially through the radial opening of the outer housing and is configured to engage the guide groove; wherein the first wedge-shaped portion is configured to be longitudinally and rotationally guided in the guide groove when the well tool is moved longitudinally; wherein the well tool is configured to rotate with the first wedge-shaped portion; wherein the orientation system has a subsequent state in which the first wedge-shaped portion is radially retracted in the radial opening of the outer housing.