A Gigli saw is a flexible wire saw used by surgeons for bone cutting.

A gigli saw is used mainly for amputation surgeries, where the bones have to be smoothly cut at the level of amputation.

Gigli saws were sometimes hidden in clothing items of British secret agents during the Second World War.

Although Gigli's operation, the lateral pubiotomy, is rarely performed today, the Gigli saw is still used to perform amputations and cranial flaps, and to section the sternum when performing an emergency clamshell thoracotomy.

When Hall was subsequently acquired by 3M Company (which was then actively developing and marketing surgical instruments), the 3M Craniotome became widely used in neurosurgery, replacing the Gigli saw (manually pulled saw wires) as the primary means of opening the skull for access to the brain for surgical procedures.