Spring Mounted Pintle Hook Assembly, 25 Ton, Max Capacity 50,000# G.T.W. X 6,000# V.L., For Use With 2-3/8" To 3" Diameter Eye And A Ring Thickness 1-1/4" To 1-5/8", Install With Grade 8 Bolts And Mount To A Plate With A Minimum Thickness Of 3/4"