An assembly for operably connecting an end effector to an electrosurgical instrument, the adapter assembly comprising: an adapter assembly including, a connector assembly； a drive transfer assembly operably received through the connector assembly and including first, second, and third rotatable shafts； a first pusher assembly operably connected to the first rotatable shaft for converting rotational motion from the first rotatable shaft to longitudinal movement to perform a first function； a second pusher assembly operably connected to the second rotatable shaft for converting rotational motion from the second rotatable shaft to longitudinal movement to perform a second function； and a drive member operably connected to the third rotatable shaft for transferring rotational motion from the third rotatable shaft to perform a third function； and at least one flexible band assembly operably connected to one of the first and second pusher assemblies.
