Hard surfaces are dig with a pick axe but imply a very slow process as it has a small coverage. Wulf Fiber Handle Shovels are best for digging big portions of the ground at once, but it can only be used on mud and soft materials. It has a sharp edge which is followed by a big slightly curved plate which holds the materials that you've dug so that you can place them somewhere else or discard them easily. It is built from strong and corrosion resistant materials which make it highly durable and long lasting.