These tools exhibit grinding on one face - they were most likely used to process or shape other materials.

Ground stone tools from Barnhouse, Orkney

These tools exhibit grinding on one face – they were most likely used to process or shape other materials.

Found at Bronze Age sites, these flaked cobbles may have been used as heavy duty choppers.
The small, finger-like tools (left) have been shaped by grinding. The larger multi-hollowed cobbles (right) are an unusual tool form.