Make curtain weights
Sew or tape keys into the bottom hem of lightweight drapes that hang near a vent or busy door.
Use as a shim
Steady a wobbly take or nightstand by sliding a key under the short leg.
Hold the neck of a soda or beer bottle firmly with one hand. Use the ridged side of a key to gently pry up the edges of the cap until it pops off.
Clean boot treads
Clear mud out of hard-to-reach ridges when you're finished in the garden or after a soggy hike.
The nonprofit organization Key of Hope. Keyofhope.org uses the proceeds from the sale of the scrap metal to help support a food pantry of your choice.