Devilbiss Vaginal Speculum

2 sets of screws for parallel or bivalve opening of the blades ?Cusco Vaginal Speculum Swiss Pattern is a double-bladed instrument with the blades slightly angled from the spring handle. The blades can be held open by a screw mechanism once inserted into the vaginal canal. The speculum is available in various sizes of blades to accommodate a wide range of cases.