... steel with high strength, and tested by UDE method Model DG225 DG315DG450Max. hook load kN (lbs) 2250 (500000 31507000004500 (1000000Spring stroke ... /3288034 21/32Weight kg(1bs) 21804806 3420754034967707 Drilling rig Hook ,DG225,DG315,DG450,hook for drilling,drilling rig,oil drilling machine ...