The Ideal Heavy Duty screw clamp is the standard that competitors have been measuring themselves against for decades. The screw clamps are produced very carefully to ensure that they comply with the DIN 5117 standard. The profiled rail has grooves placed on 6 sides to get the best grip between the arm and the rail and ensure the highest possible pushing force. The profile of the rail is carefully matched with the sliding arm to get the best strength and power. Both the rail and the sliding arm are made of cast iron with reinforcements placed at strategic points to ensure the highest possible clamping force. The sliding arm is galvanized to avoid corrosion and gives the clamp its exclusive look. Replaceable clamping plates to protect the material, change quickly and easily without tools. The Powergrip handle is ergonomically designed and has a non-slip surface treatment to achieve extra strong torque.