key is a small metal tool designed to adjust certain older types of roller skates. Although it may resemble a miniature house key or an unusual wrench, it was made for a completely different purpose.
Many traditional adjustable roller skates had metal clamps or fittings that allowed the wearer to change the length of the skate to accommodate different shoe sizes. A specialized key helped turn or tighten the adjustment mechanism.
Some skate keys were simple, short metal tools with a hollow opening at one end. Others featured a distinctive
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