Flint knapping tools, 6800-3200 BC.
© Science Museum / Science & Society Picture Library
Copies of Neolithic implements: two fish hooks; three rings, one cros; one heart, one chipped axe; three barbed arrows; three leaf arrows, one flint knife and one flint saw. Stone tools were in use for thousands of years before early humans discovered how to make tools out of metal. They were generally made out of flint which would be sharpened by hammering one piece with another, or by chipping. Flint was made into tools such as rough axes and knives and even spear and arrow heads.