... :2 7/8"-5 1/2" 3.Rated load range:100t(900kN)-350t(3150kN)... Type: drill elevator Different elevtor can be made ... ,such as PDC bits,TCI bits,rock bits,tricone bits,single cone bits,hole opener,steel tooth bits,insert tooth bits ... )Out diameter:2 7/8"-5 1/2"2)Rated load range: 100t(900KN)-350t(3150KN)Professional factory of well drilling ...