Knipex 4124225 Straight Jaw Locking Pliers 9-Inch Holds round, section and flat material securely. With adjustment screw and release lever and perfect for one-handed operation. High clamping pressure due to toggle lever action. Straight jaws for flat material. Pliers body: rolled steel, high-strength, forged, oil-hardened. Gripping jaws: chrome vanadium electric steel, forged.