heavy, 16.0 mm smooth jaws, flat handle, 5.9″ (14.9 cm), straight w/ lock?Castroviejo Needle Holder is a commonly used instrument in postoperative ophthalmologic procedures. The holder is commonly used for suturing corenoscleral wounds. The forceps feature heavy set 16mm tips for use with thicker suturing needles and a locking mechanism as desired. Both straight and curved profiles are available depending on physician preference.