If you're getting ready to install new gutters, your list of gutter tools should include a powered screwdriver, a hacksaw, a chalkline, and a ladder. The size and type of ladder is particularly important for maximum safety and ease of installation. An extension ladder is the best gutter tool for the job, don't rely on a fixed-height ladder for this one. Make sure your extension ladder projects three feet above the roof line to provide the stability you'll need to do the work. It's also important to anchor the ladder properly with an adjustable stabilizer that will brace the ladder on the roof.