1.Manual Tongs 2.Type WWC 3.Q2 3/8~10 3/4-27 WWC 4. GB/T 28001-2001 5.SY/T 5035-2004 The manual tongs are designed and manufactured in accordance with the National Standard for the Petroleum and National Gas Industry SY/T 5035-2004"Manual Tongs, Elevator links ,Elevator " which is a useful tool applied to make up and break out drill pipes,coupling hoop of the drill pipe, joint, casings,casing ...