Heavy-duty Hefty contractor bags are strong and durable enough to hold up to your toughest clean-up projects. With three different Heavy-duty Hefty contractor bags are strong and durable enough to hold up to your toughest clean-up projects. You can be sure you are getting the right bag for the right job. Whether you're cleaning out your garage or basement or tackling a home improvement project or working on the job at a construction site, you can trust our contractor bags to get the job done.