The term 'Heavy Hammer' is a phrase used to describe a type of tool used for construction and demolition. The crossword solutions for this term are MALL (4 letters), SLEDGE (6 letters), and MAUL (4 letters). A MALL is a type of hammer with a short handle and a heavy head, usually made of metal. A sledgehammer is a large, heavy hammer with a long handle, typically used for breaking up concrete or other hard materials. A MAUL is a type of hammer with a long handle and a heavy head, usually made of wood, and is used for driving stakes into the ground.