1) Drill rod together with the whole steel drill bit by welding connecting
This tools are simple produced and have within our product range the most
competitive price.It can be used for drilling of short and not difficult to drill
tapping holes with soft tap hole clay and no inclusion of slag or iron.
2) Threaded Drill rods with threaded the whole steel drill bits
The drill bit makes a clean hole with a constant diameter from beginning to end.
The bit is made from wear resistant cast steel and interchangeable with different
drill rods.
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