... drill rod.mainly used for mining, coal cutting, tunneling, rock cutting in quarrying.T38 extension drill rod,length from 1220mm,1525mm,1830mm ... ,3660mm to 6095mm.T45 extension drill rod,length from 1220mm,1525mm,1830mm,3660mm to 6095mm.T51 extension drill ... rod,length from 1220mm,1525mm,1830mm,3660mm to 6095mm.We can ...