you can only trust the makers catalogues for the patterns, far to many of the ones you can buy second hand have normaly been butched with an angle grinder because either the guys arm was to weak to handle a mans tools or he wanted it for a differant reason, like the poster below, wanting to de hook the end, the reason it has a long and hopefully sharp angled rightend hook is as hazel splay splitter or wither stripper it was not designed to be the point of chopping more of a small froe point,
we used to use tools that were brought as the larger un liked cheap version and then we used to recut and grind them to our own size and pattern, i like a curved hook with a sharp angled end and a back blade, but to stop it being to top heavy we used to re cut the blank so it was a max of 4" wide any more and it wobbles to much, i also liked a longer handle than my dad how liked a much much shorter tool as he was quicker with it , where as i was far to slow,
the one thing i dont see any more is the staple gloves for the left hand, does anyone use them any more ?