Beech Handle with 8cm Carbon Steel Blade This famous Opinel folding knife is to hand during all your adventures: hiking, camping, bivouacking, hunting and fishing. The main features of the carbon steel are its exceptional cutting quality and its very easy sharpening. To protect the blade against rust, the blade must be wiped clean of fingerprints and washed and dried after each use. Knives from size 6 upwards have the Virobloc safety system on the collar which locks the blade into position – open or shut.