1994 1995 1996 1997 Polaris Sportsman 400 4X4 Rear O-Ring Chain 520-84L 84L O Ring Chain Race-Driven O Ring Chain's tensile strength = 8200+ lbs. All chains include masterlink. O-Ring Chain helps keep the pins lubricated which reduces friction and helps the chain last longer. Fits 1994 1995 1996 1997 Polaris Sportsman 400 4X4