An example electronic security tag attachable to an item includes a tag body member, a connecting member having a pin portion releasably engageable with the tag body member, the pin portion extending along a first axis. The electronic security tag further includes a locking member to lock the connecting member to the tag body member. The locking member includes a clutch mechanism movable along a second axis parallel to the first axis between a first position in contact with the pin portion and corresponding to a locked state and a second position corresponding to an unlocked state. The clutch mechanism including at least one member formed from a non-ferromagnetic material.