 "Kielland forceps" (1915, Norwegian) are distinguished by having no angle between the shanks and the blades and a sliding lock.The pelvic curve of the blades is identical to all other forceps.The common misperception that there is no pelvic curve has become so entrenched in the obstetric literature that it may never be able to be overcome, but it can be proved by holding a blade of Kielland's against any other forceps of one's choice.