42 is an incendiary anti-tank hand grenade supplied to the Royal Italian Army during World War II.

35 hand grenade that is internally threaded and screwed to an aluminum handle which connects to the body bomb.

The body is a glass container loaded with flamethrower liquid and gasoline, which shattered upon impact or at the moment of activation of the detonator.

The project comes from handmade explosives built on the field by soldiers joining a normal OTO Mod.

Soldiers were trained to hit the air vents of the tank's engine, in order to make penetrate the incendiary liquid before ignition.