iThings J(TM)1 pcs Butterfly Trainer Blade Knife Total length: 23CM (open) Color:Black Blade length: 9.8CM Blade thickness: 0.3CM Blade material: 440C Hardness: 55-57 Net weight: 120 g Steel Stainless,very durable and nice Use for :Hiking,Climbing Mountains,Travel,Vocation,Riding,Fishing and so many outdoor Activities etc.Your good choice!