sentences:  Rotatable clips have been devised to improve localization of deployment.Also, clips that open and close (as opposed to single-deployment) have also been developed (Resolution Clip, Boston Scientific), and also facilitate the appropriate location of deployment.When a treatable lesion is identified on endoscopy (such as a bleeding vessel), an endoclip can be inserted through the channel of the endoscope until the sheathed clip is visible on the endoscopic image, and the handle for deployment handed to the nurse assistant.