Before revision: thumbnail|alt=A person holding a tracing wheel against a surface|Some tracing wheels are serrated A tracing wheel, also known as a pattern wheel, pounce wheel, and dart wheel, is an instrument with multiple teeth on a wheel attached to a handle.
After revision: double tracing wheel, with movable wheels set 3/4" apart.Athumbnail|alt=A person holding a tracing wheel against a surface|Some tracing wheels are serrated A tracing wheel, also known as a pattern wheel, pounce wheel, and dart wheel, is an instrument with multiple teeth on a wheel attached to a handle.