The Wenger awl is a solid, tapered tool with four squared edges. It works well for punching holes through soft materials, or for enlarging existing holes up to about 5mm in size (3/16")
The awl will stay sharp for a long time if you only use it on wood, leather, aluminum or copper (or other soft metals). You can use it for emergency "drilling" in sheet iron, but that will rapidly dull the awl's sharp edges.
In leather or other soft materials, you can often push the awl directly through the material, and then rotate it to get a rounded hole.