http://www.welongoiltools.com/bucking-unit-and-power-tong/ ZQ drill pipe power tong is an ideal well head tool for oil drilling apparatus, widely applied in making up and breaking out in drilling well and repairing well on offshore and land, open head design of the ZQ series allows to take the long is a combination of spinning tong and torque tong instead of cathead manual tong and spinning rope for makin up and breaking out. They are strictly designed and manufactured in according with API 7K. If need any further details of our Drill Pipe Power Tong, you can contact us freely via email, phone, whatsapp, etc. Bucking Unit and Power Tong vendor website:http://www.welongoiltools.com/bucking-unit-and-power-tong/