The traditional method of fixing the hammer on the handle is wedging. Over time, however, the knot loosened and it is necessary to change the wedge or pen.
I suggest to fix a clogged wedge with a screw or rivet passed through the bore in the sidewall of the through hole.
Recommend to read
THE AIRBOAT OFFENSIVE AND MINIATURE
...Already left behind a crucial period of the war. Vienna, like many Austrian cities, a lot of bitter've seen over these difficult years. Destroyed the magnificent palaces and...
WHO IS FASTER
You've probably heard: "he's Got good reflexes." Thicket just as they say about athletes. For example, the goalkeeper. He must react instantly to the ball rapidly flying into the net. Or...