Features Supplied with canvas sheath Double Sided Blade For cutting mineral wool & polystyrene foam Saw Blade: to cut Hard Wool Wavy Blade: to cut Soft Wool Comfortable rubber handle Lanyard Hole The multi-purpose Sterling Double Sided Insulation Knife is designed for cutting mineral wool and gliding through polystyrene foam. The stainless steel blade is engineered to stay sharper longer when cutting while the rubber handle provides user comfort.