... Description Using For Lifting Steel Vertical.Only A Single Hoisting Operation Or Using Of Two Complementary, Only A Single Vertical Clamp Lifting Weights Is ... Down, Relax Spring, And Clamp Plate Can Bu Separated.The Vertical Lifting Clamp Of Dsq1Dsq2Dsq3And Dsq5, The Proof Load Is 2 ... ,The Breaking Load Is 4 Times Working Load Limit. The Vertical Lifting Clamp Of Dsq8Dsq12Dsq16, The Proof Load Is 1.5 ...