8 and 10 to reverse their position relative to the load from that shown in fig1 so as to locate fulcrum 10 on the load side of a line of force between the chain ends to provide an over center type lock for the attachment as is conventional in chain tighteners during transport of the load shifting of one or more of the bundled articles often occurs to further tension chain c to further tighten the over center locking arrangement of the chain tightener to the extent that it cannot be released by unaided manual effort exerted on handle 5 in such instances the present attachment provides additional leverage without risk of injury or risk of forcible handle attachment separation immediately subsequent to passage of the handle past an over center position passage of handle 5 from a position associated with a dead center alignment of pivot points 8 and 10 and the line of force between the cable ends results in accelerated forceful upward movement of the handle which results in disengagement of the attachment by reason of the handle end 5a exerting lateral thrust against the continuous wall of the attachment by reason of the handle end 5a exerting a thrust against the interior surface 16a of wall 16 displacing the attachment rearwardly fig3 while permitting the hand held opposite end of the attachment to be easily retained within the operator.