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401Threaded cross-type drill bits and threaded X-type drill bits are commonly used in very hard and stony rock formations. Our company provides the following specifications and models of cross-type drill bits: Thread model：R25, R28, R32, R35, R38, T38, T45, T51; Drill diameter：33mm ~ 152mm;
Threaded cross-type drill bits and threaded X-type drill bits are commonly used in very hard and stony rock formations.
Our company provides the following specifications and models of cross-type drill bits:
Thread model：R25, R28, R32, R35, R38, T38, T45, T51;
Drill diameter：33mm ~ 152mm;
