If you're getting ready to do some remodeling or start work on an addition, you'll likely need some demolition tools. A crowbar (also called a prybar or wrecking bar) is an all-time most useful hand tool for demolition. It is great for removing stubborn nails, or as a lever for forcing apart objects. Some with a fork on one end that enables you to slide underneath old flooring or roof shingles. Then you can use the long handle as a lever to pry the materials apart.