Heavy Duty SwivelPivot Lift PlateMaterial: Forged High Strength 4140 alloy steel Design Factor: 5:1, Hoist Rings retain the same rated load from 0 to 90 degrees from the bolt axis, Minimum tensile strength of 180, 000 psi, Magnetic Particle Inspected Per ASTM 1444 (Cadmium plated available) Range of Movement: Swivel 360, Pivot 180 Under Load Finish: Black Oxide per Mil C-13924B Patent Numbers: 4, 570, 987***; 4, 641, 986***; 5, 405, 210 All dimensions approximate variations do not effect use or design factor.