Brindley worked, for example, to improve the grinding of flints, which were used in the rising pottery industry.

Cigarette lighters and other lighters, whether or not mechanical or electrical, and parts thereof other than flints and wicks.

The warriors carry long, ash spears tipped with hand-shaped flints as sharp as shards of broken glass, and blunt-headed stone clubs hanging from loops on broad oxhide belts.