The one-touch adjustment directly on the workpiece allows for quick and convenient handling. The fine adjustment ensures optimal adaptation to a variety of workpiece sizes and a user-friendly grip position. The secure locking of the hinge pin prevents unintentional adjustments. The cage design provides high stability due to the double guidance, while the self-locking feature on pipes and nuts prevents slipping on the workpiece and makes work easier. The gripping surfaces are equipped with specially hardened teeth that have a hardness of about 61 HRC, ensuring a permanently secure grip due to high wear resistance. The one-handed adjustment and clamping protection prevent pinch injuries, and the favorable lever enables optimal power transmission. Made from chrome-vanadium electrosteel, this product is forged and multi-stage oil-hardened.