Hunters Specialties Rack Jack Rattle Device Deer Call - The Rack Jack is a cylindrical injection-molded device with a rod type ram with cylindrical rings. This device creates the sound of two battling bucks that are sure to wake up nearby deer. Unique cylindrical injection molded device with a rod type ram with cylindrical rings. Creates the sound of two battling bucks by the friction between the two. The rod snaps tight into the cylinder for quiet carry. Compact design that is held together by a cord that allows the function but not removal.