My husband found this in his grandparents’ house. It looks like keys but doesn’t open any door in the house, and it’s quite old. What could it be?

designed to fit a particular nut, bolt, or adjustment fitting rather than the keyhole of a lock.

2. Check for Wear
An old skate key may show scratches, worn edges, rust, or dark discoloration from years of use and storage.

Wear around the opening can be especially revealing because the tool was repeatedly fitted over a metal adjustment part.

3. Look for Markings
Some examples have a manufacturer’s name, logo, model number, or other stamped marking. These details can help narrow down the period and the type of skate the

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