Barrel hoops and saw: what they have in common

1. Step 1. Barrel hoops — is part of — Barrel. Metal hoops pull the staves together.
2. Step 2. Barrel — works like — Arch. Staves squeezed by hoops hold their shape by the same compression as the stones of an arch.
3. Step 3. Arch — is made of — Brick. Arches were built of brick or stone.
4. Step 4. Brick — uses — Trowel. Bricklaying with a trowel.
5. Step 5. Trowel — has part — Handle. A handle on a curved neck.
6. Step 6. Handle — is part of — Saw. A handle.

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