It is because with the 3 points it was to big to hold in the Hand
The problem whit this there is very little writing on this weapon
Shelford did tell about this in an artikel that was presented in 1901 that the shape off the handle maybe compared whit the Y schaped handle off stag horn of the Mahakkam river parang ilang
I also look when anyone has a book off this subject let me know.
I think first style was like my avater than came
the fork style just because more easy to make.
(but don t now it for sure there is also another style off handle used by the Muruts)