No, this isn’t another link to “Oh my god, there’s an axe in my head“. It’s to the very interesting (and very narrowly focused) Boarding Axes in the Age of Sail website.
The boarding axe was a combat tool and weapon from the fighting age of sail and has become one of the rarest survivors from that period. Once a common implement found in large quantities on all armed sailing ships, it has almost, by virtue of its lowly status, become extinct. Even the major arms and armour museums […] can boast only a handful of boarding axes.