Torsion-resistant I-profile rail made of cold-rolled steel, heat-treated and case-hardened. Features removable protective caps with smooth, well-adhering surfaces to protect against damage and scratches. Equipped with a smooth-running clamping handle for high clamping force. The design is robust and reliable, ensuring effortless and safe working. Controlled release of the grip pliers is facilitated by the Trulock pulling mechanism. Allows for simple conversion from clamping to spreading without tools. The robust plastic body ensures longer and more powerful clamping and spreading work, reinforced with glass fiber struts for enhanced durability.