Ruko Knives Classic Jack Features The Ruko Knives Classic Jack carries two 440A stainless steel blades at 3.31 each both ground to a fine edge and finished with a plain non serrated cutting surface suited to clean controlled cuts. The 440A steel is hardened to 55 through 58 on the Rockwell scale a range that balances edge retention against ease of resharpening for everyday carry use. A nail nick opening system is used to deploy each blade a traditional method that keeps the knife s profile slim and free of external levers or studs. Each blade locks open with a slip joint mechanism a time tested design that provides secure use while still allowing the blade to fold safely closed when not needed. The handle is crafted from Pakkawood a resin impregnated wood laminate prized for its durability and resistance to moisture compared to untreated natural wood. This classic two blade jack knife pattern has long been a go to design for general utility tasks from light cutting to small repair jobs around the house or in the field. At just 0.20 lbs the knife is light enough to carry daily without being noticed in a pocket. Ruko Knives ships the Classic Jack in protective clamshell packaging and it is available for sale at GrabAGun for collectors and everyday carriers who appreciate a traditional pocket knife. RUKO Knives Classic Jack Specifications Manufacturer: RUKO Knives Model: Classic Jack Type: Folding Knife Blade Length: 3.31 Blade Material: 440A Stainless Steel Edge: Plain Blade Grind: Fine Blade Hardness: 55-58 Handle Material: Pakkawood Lock Type: Slip Joint Open Type: Nail Nick No. of Blades: 2 Weight: 0.20 lbs Available At: GrabAGun