HDD Supply's Thrasher bit chews through hardpan, caliche and sandstone. The key features of this bit include: a series of aggressive conical carbide cutters precisely positioned at the optimum cutting angle; the entire perimeter of the bit is protected with carbide impregnated hard-surfacing; bit body is constructed from 4140 plate for long service life. The result is an aggressive, long lasting bit that delivers good results in tough conditions.