The surgical instrument includes a first member that includes a drive that engages the first mating surface of the bone fixture. The second member is rotatable with respect to the first member and includes an element engageable with the second mating surface of the bone fixture. The actuator is connected to a second member and includes a visual indication of the engagement of the element with the second mating surface. Systems, spinal implants and methods are disclosed. [Selection diagram] Fig. 5手術器具は、骨固定具の第１の合わせ面に係合可能な駆動部を含む第１の部材を含む。第２の部材は、第１の部材に対して回転可能であり、骨固定具の第２の合わせ面に係合可能な要素を含む。アクチュエータは、第２の部材に接続され、該要素と第２の合わせ面との係合の視覚表示を含む。システム、脊椎インプラントおよび方法が開示される。【選択図】図５
