Cast aluminum frame, reinforcing handle ribs, specially ground blades, allows cut material to flow unobstructed, away from the user's hand. Rounded contours fit the hand comfortably, cuts Vinyl, Aluminum, Copper, Stainless Steel (26 Gauge)Galvanized Steel (24 Gauge), cuts in tight material, shapes such as J-Channel. Replaceable blades. Metallic gray finish.