1. The drill pipe power tong is an ideal oil drilling wellhead tools, widely used in marine, land drilling and workover operations on unloading column threaded operations. 2. Use of this clamp can play safety, labor saving, convienient and reliable operation.. 3. The series tong is a combination of spining tong and torque tong, it substitutes cathead, manual tong and rotary rope in making-up and breaking-out.4. ZQ 203-125 is national patented product, with auto-door,hydraulic and pneumatic combination control system 5. The tongs are in line with norms SY/T5074 standards and API Spec 7K.