A tenaculum on the cervix is a specialized surgical instrument used in obstetrics and gynecology to stabilize and manipulate the cervix during various procedures. It is a small, hook-shaped instrument with sharp prongs that are gently inserted into the cervix to provide traction or secure it in place. Tenacula are essential for procedures such as biopsies, colposcopies, cervical surgeries, and intrauterine device (IUD) insertions, ensuring precise and safe execution by preventing the cervix from moving or slipping during the procedure.