So i bought some new pumps...
And improved them..
The Sjösala warhammer has extra tubing inserted in the handle and working end for reinforcement and to fully secure the chain in each end. The chain is secured by a bolt trough the internal tube that has been welded in place.
The Sjösala Cutthroat has a full tang handle, reinforced with tubing and then welded to the chromed exterior handle.