These flaked stone bars were made from sandstone cobbles rather than quarried blocks.

Flaked stone bars from Sumburgh, Shetland

These flaked stone bars were made from sandstone cobbles rather than quarried blocks.

Flaked lithics are knapped using these hammerstones.
A flaked stone bar (left) is manufactured by knapping a larger block of sandstone (right). Large quantities of distinctive flake debris can be produced (centre).