PETOL VISETONGS are designed to operate best when large makeup torques are required and when heavy loads are needed to breakout tool joints, drill collars, reamers, and similar heavy jobs. A hydraulic cylinder can be attached to the end of the tong handle. PETOL Visetongs have the unique feature of being easily adjusted to various pipe sizes by simply sliding the heat-treated PETOL Special Chain through the jaw of the tong and engaging the locking cam lever. Regardless of the load on the handle, these tongs will not jam. PETOL Visetongs have minimum crushing effect, and great strength for their weight. Made of high-quality steel, these tongs are equipped with replaceable high-speed steel PETOL Diamond Point Inserts, which minimize marring of pipe surfaces. PETOL Visetongs come in both pushup and pulldown designs. WARNING - Do Not Exceed Maximum Working Load. Overloading may result in injury or death. Always use a load cell or other calibrated indicating device to monitor the line pull on the tong to avoid overload. Read Safe Practices & Procedures Manual prior to operation. Follow OSHA, NSC, etc. standards, safe practices, and procedures.