If you have ever tried to cut 2-in rigid foam insulation with a regular utility knife, you will love the Aluminist. The cutting edge is 1-inch wide, made up of six segmented blades, extends out from ½-in to 3-3/4-inch and is made of premium carbon steel. Simply snap the blade off when it is dull and extend the cutting edge. The body is die-cast aluminum, 8-inches long, with a heavy gauge stainless steel blade sleeve. The tool comes with two additional blades on board. This heavy duty knife will not disappoint.