Just an inch or two? So I need a good metal detector.

No, if it's brass, it will give off a good signal that even a cheapo can
find. A 2' piece of rebar will also give off a good signal. Hang one of
the neodymium magnets on a string, and walk over it. You may be able to
find it that way, too. That method works for small meteorites, it would
work for a 1 inch piece of rebar.

Steve