< xml:namespace prefix = o /> Same as top hammer button bits, DTH button bits have different face design, different button shapes, different flushing holes design, different hole openers designs. At ZM, whatever flat face, convex face, concave face, drop center face, spherical buttons, ballistic buttons, spike buttons, conical buttons, any design is available according to customers’ request. The diameter is from < xml:namespace prefix = st1 />60mm to 700mm. The shanks can be Cop series, like cop32, cop34, cop44, cop54, cop64, DHD series, like DHD3.5, DHD350, DHD340, DHD360, QL series, like QL40, QL60, SD series, SD4, SD5, SD6, SD8, and so on. All DTH button bits are hot pressed and excellent heat treatment, which guarantee our quality, are always consistent and reliable.

 We can manufacture all kinds of bits and shells according to customer's special requirement. 

Any requirement please contact us, we'll do the best service for you. Hope we can establish a good business relationship.