Extra Wide Cooks Blade 10 Inch Blue: Blades are manufactured using high quality 420 stainless steel that has added Molybdenum, which gives the steel excellent edge retention, high durability and exceptional rust resistance. Each knife in the Samprene range features a moulded handle, which combines the strength and durability of Polypropylene with the softness and serenity of rubber. A combination of sublime strength and lasting comfort.