Pressed grinding wheels.
If they all kept still, 250 elephants
standing atop one another could do it: Our grinding wheels,
with diameters as large as 900 mm, are compacted with up to
900 tonnes of pressure. Depending on the requirements of our
customers, we manufacture individually customised and high-performance
abrasives, with variable thickness, compression, material
composition and grain.
Unless you want something else.