Handles and stone tool: what they have in common

1. Step 1. Handles — is part of — Saucepan. Handles.
2. Step 2. Saucepan — is made of — Stainless steel. Stainless steel.
3. Step 3. Stainless steel — is material for — Cutlery. Stainless steel.
4. Step 4. Cutlery — has part — Knife. Knives.
5. Step 5. Knife — evolved from — Stone tool. The first knives were stone flakes.

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