... ).Model: DG225,DG315,DG450,DG675 4).competive price hook block DG225,DG315,DG450,DG675The hook & block are designed and manufactured in accordance with API ... -hook opening, mm(in)190(7 1/2)220(8 5/8)220(8 5/8)238(9 3/8)Diameter of ... major-hook, mm(in)160(6 1/4)180(7)180 ...