Black Painted Steel. These are  Elbow type. These two types fit almost all brands: Except Western Electric

                            Kellogg Crank handle.

Here is a working telephone  crank for a wooden wall phone or a wooden magneto. Fits many manufactures including  Kellogg, Stromberg Carlson, American Electric, Monarch, Leich, Julius Andrae, Sears and Montgomery Ward. Does not fit Western Electric.