The material used is "super alloy steel cobalt," which makes these scissors extremely hard and lightweight, allowing for a design that reduces fatigue even during prolonged use. Super alloy steel also boasts excellent corrosion resistance, making it resistant to rust even in humid environments. This series offers a variety of sizes, from the 5.5-inch K-5500 to the 8.0-inch K-8000, providing professionals with a selection to meet their needs. The sharpness is still outstanding. It is recommended to have them sharpened when you feel the need. Currently, they can cut through wet tissue paper with ease. There is no case included. #Scissors