An Instrument for use with a polyaxial bone anchoring device, wherein the polyaxial bone anchoring device includes a receiving part (5) for receiving a rod (100) and for accommodating a head (3) of a bone anchoring element (1), wherein the head (3) can be clamped by exerting pressure onto it via a clamping element (7) and wherein the pressure can be adjusted using the instrument, the instrument including a first member (10, 11) having a first engagement portion (12a, 12b) that is configured to engage the receiving part (5) in a positive-fit manner； a second member (20, 21) having a front end (21a) and a second engagement portion (22, 22a) that is configured to engage the clamping element (7) and apply torque to the clamping element； wherein in a first configuration the second member is only axially displaceable along a longitudinal axis (C) relative to the first member and wherein in a second configuration the second member is rotatable with respect to the first member.
