I have a simple question. How do you keep your splitting axe heads tight? I use a heavy splitting axe, about 6-7lb. I have broken the handle twice from the head loosening. I use hickory hadles about 40 inches long. Any body have any tricks? I just replaced the handle and it is loose again. I am splitting some very hard/large logs. I am splitting oak, maple, birch but ends from a local veneer plant. Some are up to 2 ft in diameter by 20 inches long.