A medical device for causing the hemostasis of a blood vessel for use through an endoscope, said medical device comprising: a clip, the clip having at least two clip legs; a control wire able to be coupled to the clip, the control wire reversibly operable both to open the at least two clip legs and to close the at least two clip legs, the control wire uncouplable from the clip; an axially rigid sheath enclosing the control wire, the sheath able to communicate a first force opposing a second force of the control wire; a handle coupled to the axially rigid sheath; and an actuator coupled to the control wire, the control wire engageable by the actuator to open the at least two clip legs, to close the at least two clip legs, and to uncouple the control wire from the clip; wherein the control wire is coupled to the clip by a j-hook, the j-hook being able to be deformed by a first predetermined tensile force, and when the j-hook is deformed, the control wire uncouples from the clip.