Unless you regularly need to break up concrete slabs or cut through foundations, you probably can't justify the cost of buying a jackhammer or a portable cutoff saw. But when the need does arise, it's useful to know what tools are available for hire, or you may find yourself (as I have) rattling your brains out with nothing but a sledge hammer and cold chisel. Breaking Concrete There are several options for breaking up concrete. The most common tool is a paving breaker, otherwise known as a jackhammer. Which you choose depends on the strength and amount of the concrete you have to remove, and the availability of the tools. Electric jackhammers. Electric jackhammers are the easiest and cheapest to use because