One of these days, I hope to run across what I see often referred to as a "spaltaxt" which has a narrow wedge in the head to cut friction as you wedge the wood apart.
The form factor of the 'rectangular' heads like that Hultafor has puts a lot of weight behind the wedge to split effectively.
The form factor of the 'rectangular' heads like that Hultafor has puts a lot of weight behind the wedge to split effectively.