Denture clasps and rock drill: what they have in common

1. Step 1. Denture clasps — is part of — Dentures. Clasps that hold on to the remaining teeth.
2. Step 2. Dentures — is made of — Bone. With teeth made of bone or real teeth.
3. Step 3. Bone — is material for — Needle. The first needles with an eye were carved from bone.
4. Step 4. Needle — is part of — Syringe. A hollow needle.
5. Step 5. Syringe — has part — Piston. A plunger.
6. Step 6. Piston — is part of — Rock drill. A percussion piston.

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