Overburden Casing System

Our Hyundai Everdigm Durawing Casing System is a superior "winged" Drill Bit used for casing boreholes when using a DTH Hammer.
The Durawing Bit has very easy to deploy or retract wings and these wings are kept clear by the flushing air.
There is a Durawing Bit for almost every Borehole size.