The Signal from Leatherman offers a small package that's ready for big wilderness. The 4 1/2-inch size offers 19 tools, including survival tools such as a fire-starting rod and emergency whistle. Leatherman's compact Signal even features a built-in hammer. The combo blade is made from 420HC steel, a rust-resistant material that is easy to sharpen and can stand up to heavier-duty work. Wherever you go, the Signal is ready.