A medical device for engaging tissue, the medical device comprising: a housing defining an internal passageway and a longitudinal axis extending between proximal and distal ends of the housing, the housing defining first and second guide surfaces (82, 84) along the internal passageway; a first jaw slidably connected to the housing, the first jaw having proximal and distal ends (64, 60), the first jaw slidably received within the internal passageway for longitudinal movement along the first guide surface between an extended position and a retracted position; a second jaw slidably connected to the housing, the second jaw having proximal and distal ends (66, 62), the second jaw slidably received within the internal passageway for longitudinal movement along the second guide surface between an extended position and a retracted position; the housing structured to block rotation of the first and second jaws (44, 46) when in their retracted positions, the housing structured to permit rotation of the first and second jaws (44, 46) when in their extended positions; a driver engaged with the proximal ends of the first and second jaws (44, 46), configured so that longitudinal movement of the driver moves the first and second jaws (44, 46) longitudinally along the first and second guide surfaces (82, 84) between their retracted and extended positions, wherein the first jaw is also pivotally connected to the housing and the first guide surface has a distal end, wherein, in the extended position of the first jaw, the distal end of the first guide surface restricts longitudinal movement of the first jaw beyond the extended position; and wherein the second jaw is also pivotally connected to the housing and the second guide surface has a distal end, wherein, in the extended position of the second jaw, the distal end of the second guide surface restricts longitudinal movement of the second jaw beyond the extended position; characterized in that, when the first and second jaws (44, 46) are in their extended positions, further longitudinal distal movement of the driver rotates the first and second jaws (44, 46) relative to the housing and radially outwardly from each other into a tissue receiving position. a housing defining an internal passageway and a longitudinal axis extending between proximal and distal ends of the housing, the housing defining first and second guide surfaces (82, 84) along the internal passageway; a first jaw slidably connected to the housing, the first jaw having proximal and distal ends (64, 60), the first jaw slidably received within the internal passageway for longitudinal movement along the first guide surface between an extended position and a retracted position; a second jaw slidably connected to the housing, the second jaw having proximal and distal ends (66, 62), the second jaw slidably received within the internal passageway for longitudinal movement along the second guide surface between an extended position and a retracted position; the housing structured to block rotation of the first and second jaws (44, 46) when in their retracted positions, the housing structured to permit rotation of the first and second jaws (44, 46) when in their extended positions; a driver engaged with the proximal ends of the first and second jaws (44, 46), configured so that longitudinal movement of the driver moves the first and second jaws (44, 46) longitudinally along the first and second guide surfaces (82, 84) between their retracted and extended positions, wherein the first jaw is also pivotally connected to the housing and the first guide surface has a distal end, wherein, in the extended position of the first jaw, the distal end of the first guide surface restricts longitudinal movement of the first jaw beyond the extended position; and wherein the second jaw is also pivotally connected to the housing and the second guide surface has a distal end, wherein, in the extended position of the second jaw, the distal end of the second guide surface restricts longitudinal movement of the second jaw beyond the extended position; characterized in that, when the first and second jaws (44, 46) are in their extended positions, further longitudinal distal movement of the driver rotates the first and second jaws (44, 46) relative to the housing and radially outwardly from each other into a tissue receiving position.