Every bit of length, taper, angle, weight and sharpness contributes to how and for what the axe is used. The temper (hardness) of the metal must be hard enough to hold an edge and soft enough to file and not be brittle. A blunter maul with an abrupt taper blows the wood apart, or bounces off if it cannot penetrate. A sharp bit with a longer taper will cut in and penetrate easier before splitting the wood apart. If it doesn’t fully succeed one must pump the handle to loosen the head and hit it again.