FLISSA Pocket Knife, 3.5″ Folding Stonewash Blade Tactical Knife, G10 Handle, for Outdoor, Survival, Hunting and Camping, Great Gifts for Dad. FLISSA FOLDING POCKET KNIFE. 👍Durable: The blade is made of premium stainless steel with black stonewash for excellent hardness—the excellent heat-treated fixed blade with an ultra-sharp edge and hardness up to 60-62 HRC.