Extension rod, with male threads at both ends, connects with a shank adapter through a coupling sleeve.  extension drill rod can divide into round extension rods and hexagonal extension rods, and is widely used in bench drilling, bolt hole drilling, production drilling, long hole drilling, small hole drilling and other fields.

Litian owns a large scale drill bit extension rod factory to produce and provide high quality rock drill extension rod, such as R22 drill extension rod, R25 extension rod, R28 extension rod, R32 extension rod, R38 extension drill rod, T38 threaded extension rod, T45 extension rod, T51 rod...

As one of rock drilling tools manufacturers, we can offer different kinds of rock mining tools for sale, if you are interested, please contact us.