Solid Aluminium handle 2 stainless steel plates 12C27 stainless steel blade Thickness: 3 mm Hardness: 56-57 Hrc Spring “guilloché” Delivered in brown cardboard presentation box with certificate of origin and lifetime warranty Closed length : 12 cm, opened length: 22 cm French artisanal making The handle of this knife is made of only one piece of solid aluminium, this accentuates the pure line of the laguiole.