King Kong Cir Series Bits are same as Atlas Copco and Sandvik etc international Cir Series DTH Hammer. The Cir Series hammer including Cir70, Cir90,Cir100,Cir110, Cir130, Cir150 etc with the suitable diameter from 76mm to 170mm Diameter. 

We select best steels from Sweden Ovako factory or Baogang, the Tungsten carbide inserts are selected YK05 with hot insert technology. We use the best materials and best technology because we always believe that the quality is the first step for us to build truth with our customers.

If you are ready to test Chinese DTH bits, Why not test King Kong's DTH bits?

If you are disappointed with some Chinese quality , why not change King Kong's DTH bits to test ?

If you are looking for a stable suppliers in China, King Kong will be your best choice.

Cir90mm DTH bits can match with 

90mm,100mm,110mm and 120mm DTH bits, We use the best technology to improve the Bit's quality and also compare with Atlas copco and Sandvik. Up to now, Our Cir series bits have been exported to Brazil, Pure, American, South African, South Aisa etc areas. The drill bits are normally used on limestone,Granite, bluestone etc.  YK05 button inserts can let the drill bits bear any hardness rocks. Special design can improve the drilling efficiency.

Button bits should be reground when penetrati on rat es drop or if the cemented carbide shows signs of damage
Fixed grinding routines often result in good working practices.
Bits for instance, can be examined and then reground after a specific number of holes, or at the end of the shift. Premature grinding is not necessarily uneconomical since less carbide needs to be ground off. It is better to regrind rather than reducing productivity due to damage.
Correct grinding adds considerably to drill bit service life. But equally important, it also enhances the performance of the entire drilling operation, especially hole straightness.