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Suitable for special drilling operation in soft to medium soft formations (f =1~5).

? Features

Carbide bits have a simple structure with low operation cost and high drilling efficiency.

? Sizes

Ordinary steel bits: F75, F94, F113, F133, F153

Plug-in type of casted steel spiral bits:F75~F150 (For special drilling operation of gas drainage boreholes in the coal seam) Large diameter bits for rescue: F300, F450, F600 ( Specially for across roadway and rescue borehole drilling operations).