Lighter and sickle: what they have in common

1. Step 1. Lighter — works like — Flintlock. The same way of striking a spark.
2. Step 2. Flintlock — is made of — Flint. A flint strikes the spark.
3. Step 3. Flint — is material for — Sickle. Neolithic sickles were a wooden base with flint inserts.

Open Evothings