Wooden Fastener on a Duffel Coat

Puzzle 7 of Common Dreams Hard Pack

Question is: Wooden Fastener on a Duffel Coat

and the answer is: TOGGLE

Word Meaning:

TOGGLE — (nautical) A wooden or metal pin, short rod, crosspiece or similar, fixed transversely in the eye of a rope or chain to be secured to any other loop, ring, or bight, e.g. a sea painter to a lifeboat.

Definitions from Wiktionary.