Bernays’ Utero-Tractor is an intrauterine diverging vulsellum forceps, strongly built and terminating in blades that are curved outward on the edge in opposite directions, the outer margins being provided with four strongly-built hooks.  A spring maintains the handles in an open position, thus giving to the blades the appearance of a slightly curved arrangement to ease introduction into the endocervical canal.  After being passed through the cervix, the blades are separated by closing the handles, each securing a firm inner grasp along the entire length of the cervix and the handle are retained in position by a ratchet mechanism – Truax figure 1288.