This Trailer Lug Nut is Chrome Plated. We refer to this size as Short because we also have a longer one available for longer hub studs. This lug nut measures 1 1/2 inches overall and still uses the standard 1/2-20 Thread Size. This is a full coverage, acorn style lug nut. Acorn Style Lug nuts are Ideal on Aluminum Wheels. You will use a 3/4" Socket or Lug Wrench to install. Will fit standard 4 lug, 5 lug, 6 lug, and 8 lug trailer hubs and brake drums.