Abrasive and stone tool: what they have in common

1. Step 1. Abrasive — is material for — Sandpaper. An abrasive.
2. Step 2. Sandpaper — works like — File. Removing material with small cutting edges.
3. Step 3. File — has part — Tang. The end for the handle.
4. Step 4. Tang — is part of — Knife. The part of the blade fixed in the handle.
5. Step 5. Knife — evolved from — Stone tool. The first knives were stone flakes.

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