This Estwing post hole digger is a heavy-duty 25mm/1 carbon steel bar for higher strength in the toughest of jobs. It has heat treated ends for higher durability and toughness over time. It has a 60mm/2-3/8 mushroom head at one end and bevelled chisel edge at the other. It is ideal tool for fence post work, for digging holes, breaking up clay and cutting through tree roots.