Sandstone blockhead, Egypt, c 3000 BC.
© Science Museum / Science & Society Picture Library
Sandstone block found on the site of the Temple of Zoser, Saqqara, Egypt. Hand drills with flint heads were used to drill holes in stone construction blocks, such as this trial piece. The flint was probably attached to the end of forked sticks which the mason would rotate in his hands at speed to drill through the stone.