I made a wee froe from a 1lb lump hammer head, the cutting edge is about 4.5 inches long. One of the original hammer heads can be seen in the photo below.
Shown next to a Mora carving knife to give an idea of size.
Splitting an 8" piece of oak
Job done.
Shown next to a Mora carving knife to give an idea of size.
Splitting an 8" piece of oak
Job done.